| 
                                    
                                        gptkbp:instanceOf
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:Savings_bond
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:availableOn
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:TreasuryDirect.gov
                                        
                                         
                                    
                                        
                                            
                                            with IRS tax refund
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:award
                                    
                                 | 
                                
                                    
                                        
                                            
                                            for 30 years or until redeemed
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:awardedFor
                                    
                                 | 
                                
                                    
                                        
                                            
                                            yes
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:canBeCoOwned
                                    
                                 | 
                                
                                    
                                        
                                            
                                            yes
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:canBeRegisteredToTrust
                                    
                                 | 
                                
                                    
                                        
                                            
                                            yes
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:canBeReissued
                                    
                                 | 
                                
                                    
                                        
                                            
                                            yes (under certain conditions)
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:canBeUsedForEducationTaxExclusion
                                    
                                 | 
                                
                                    
                                        
                                            
                                            yes
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:country
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:United_States
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:defaultRisk
                                    
                                 | 
                                
                                    
                                        
                                            
                                            none (U.S. government backed)
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:denomination
                                    
                                 | 
                                
                                    
                                        
                                            
                                            $25 and above
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:earlyRedemptionPenalty
                                    
                                 | 
                                
                                    
                                        
                                            
                                            forfeit last 3 months interest if redeemed before 5 years
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:electronicBondAvailability
                                    
                                 | 
                                
                                    
                                        
                                            
                                            via TreasuryDirect
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:hasModel
                                    
                                 | 
                                
                                    
                                        
                                            
                                            unique per bond
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:inflationIndex
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:Consumer_Price_Index_for_All_Urban_Consumers_(CPI-U)
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:inflationProtection
                                    
                                 | 
                                
                                    
                                        
                                            
                                            yes
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:inheritance
                                    
                                 | 
                                
                                    
                                        
                                            
                                            yes
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:interestCompounding
                                    
                                 | 
                                
                                    
                                        
                                            
                                            monthly
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:interestCrediting
                                    
                                 | 
                                
                                    
                                        
                                            
                                            semiannually
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:interestRateFormula
                                    
                                 | 
                                
                                    
                                        
                                            
                                            fixed rate + inflation rate
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:interestRateUpdateFrequency
                                    
                                 | 
                                
                                    
                                        
                                            
                                            every 6 months
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:introducedIn
                                    
                                 | 
                                
                                    
                                        
                                            
                                            1998
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:issuedBy
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:United_States_Department_of_the_Treasury
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:mainInterest
                                    
                                 | 
                                
                                    
                                        
                                            
                                            variable
                                        
                                        
                                         
                                    
                                        
                                            
                                            fixed
                                        
                                        
                                         
                                    
                                        
                                            
                                            combination of fixed and inflation rate
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:marketability
                                    
                                 | 
                                
                                    
                                        
                                            
                                            non-marketable
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:maturation
                                    
                                 | 
                                
                                    
                                        
                                            
                                            30 years
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:minimumHoldingPeriod
                                    
                                 | 
                                
                                    
                                        
                                            
                                            1 year
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:ownershipLimit
                                    
                                 | 
                                
                                    
                                        
                                            
                                            $5,000 per Social Security Number per year (paper)
                                        
                                        
                                         
                                    
                                        
                                            
                                            $10,000 per Social Security Number per year (electronic)
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:paperBondAvailability
                                    
                                 | 
                                
                                    
                                        
                                            
                                            only via tax refund
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:purchaseLimit
                                    
                                 | 
                                
                                    
                                        
                                            
                                            $10,000 per person per year (electronic)
                                        
                                        
                                         
                                    
                                        
                                            
                                            $5,000 per person per year (paper, with tax refund)
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:purpose
                                    
                                 | 
                                
                                    
                                        
                                            
                                            protect against inflation
                                        
                                        
                                         
                                    
                                        
                                            
                                            encourage personal savings
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:redemptionLocation
                                    
                                 | 
                                
                                    
                                        
                                            
                                            TreasuryDirect (electronic bonds)
                                        
                                        
                                         
                                    
                                        
                                            
                                            financial institutions (paper bonds)
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:riskFactor
                                    
                                 | 
                                
                                    
                                        
                                            
                                            low
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:supportedBy
                                    
                                 | 
                                
                                    
                                        
                                            
                                            full faith and credit of the U.S. government
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:targetAudience
                                    
                                 | 
                                
                                    
                                        
                                            
                                            individual investors
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:taxStatus
                                    
                                 | 
                                
                                    
                                        
                                            
                                            federal income tax
                                        
                                        
                                         
                                    
                                        
                                            
                                            exempt from state and local taxes
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:transferability
                                    
                                 | 
                                
                                    
                                        
                                            
                                            non-transferable
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:valuation
                                    
                                 | 
                                
                                    
                                        
                                            
                                            purchased at face value
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:website
                                    
                                 | 
                                
                                    
                                        
                                            
                                            https://www.treasurydirect.gov/savings-bonds/i-bonds/
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:bfsParent
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:TreasuryDirect_account
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:bfsLayer
                                    
                                 | 
                                
                                    
                                        
                                            
                                            7
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        https://www.w3.org/2000/01/rdf-schema#label
                                    
                                 | 
                                
                                    
                                        
                                            
                                            Series I Savings Bonds
                                        
                                        
                                         
                                    
                                 |