[t*], global, hourlyBondAccounts, amount, f: raw balance
[t], applyInterest, balance, f: debt
[t], applyInterest, yieldQuotientFP, f: interest rate
[t*], updateHourlyBondAmount, bond, yieldQuotientFP, f: interest rate
[t*], updateHourlyBondAmount, bond, amount, f: debt
