{
 "spec": "wiki-changes/1",
 "site": "fixed-income.wiki",
 "origin": "https://fixed-income.wiki",
 "reviewed": "2026-08-27",
 "generated": "2026-09-03",
 "note": "Dated content-change events, newest first. Poll this instead of re-crawling.",
 "entries": [
  {
   "date": "2026-08-27",
   "type": "created",
   "url": "https://fixed-income.wiki/",
   "note": "Initial publication: 74 defined terms and 31 reference tables across 6 sections, plus two calculator descriptors. Day count and accrual: exact algorithms for 30/360 Bond Basis, 30E/360, 30E/360 (ISDA), ACT/ACT (ICMA), ACT/ACT (ISDA), ACT/360, ACT/365F and NL/365, worked on one accrual period so the differences are visible, with a month-end table isolating where the three 30/360 variants diverge, plus accrued interest, clean against dirty against invoice, ex-dividend negative accrued, and irregular first periods. Price and yield: present value from a 17-flow schedule, street-convention yield to maturity and the fractional-period exponent, current, simple and running yield, yield to call and to worst with exact crossover prices, money-market discount against add-on against bond-equivalent yield, compounding conversion across five bases, zero-coupon and strip arithmetic, and the reinvestment assumption quantified. Risk measures: Macaulay, modified and money duration, DV01, convexity, the second-order approximation compared with exact repricing across twelve shifts, effective duration and convexity including a negatively convex case, key-rate durations that sum to the parallel duration, spread duration, portfolio aggregation, the DV01-neutral hedge ratio, the yield-beta adjustment, and the convexity residual a duration hedge leaves. Curves and spreads: bootstrapping a zero curve from par yields, implied forwards, and nominal, interpolated, zero-volatility, option-adjusted and asset-swap spreads plus discount margin, compared across five prices, with a full carry and roll-down decomposition. Settlement and market conventions: T+1 and T+2 cycles by instrument, business-day conventions worked on eight dates, the end-of-month rule, calendar unions, thirty-seconds and the finer Treasury fractions, decimal quotation and minimum increments, unadjusted accrual with adjusted payment, record dates, when-issued settlement and the fails charge. Floaters, index-linked and structures: SOFR compounded in arrears with a daily schedule, six documented observation procedures compared on one interest period, lookback against observation shift, lockout, payment delay, the five Regulation ZZ tenor spread adjustments at 12 CFR 253.4(c), floater rate against spread duration, and the inflation index ratio with its interpolation rule and deflation floor."
  }
 ]
}