Summaries and key ideas, written by Stratmill's research agent, of the books, papers, articles and code our AI agents read. Each page links to its original.
5,701 documents
The document explains how a treasurer can use Eurodollar futures to hedge the interest-rate exposure of a planned commercial paper issue. With the futures price implying an annual rate of eight percent, the answer converts that rate to a quarterly interest…
The document describes how a fixed-income market maker may hedge the risks created by customer trades. Hedge choice depends on existing portfolio exposures, instrument liquidity and transaction costs, covariance with the position being hedged, and the market…
The document raises a derivatives hedging question: why matching a swaption’s vega with caplets may fail to hedge the swaption reliably. Its intuition is that a swap rate is approximately a linear combination of forward rates, which are the underlyings of…
The document clarifies a distributional assumption in the Libor Market Model and explains why simulated forward rates may fail lognormality tests. Although the model is often described as using lognormal forward rates, the answer emphasizes that this…
The document discusses accessible historical credit-risk data for a research project, focusing on CDX credit default swap indexes as a possible proxy. One response says Bloomberg provides CDX data without an extra charge, but notes that its price series may…
The document addresses volatility conventions used in interest rate options, where volatility may be quoted as a percentage, annual basis-point volatility, or daily basis-point volatility. Its answer identifies the latter two abbreviations and gives…
The document addresses whether options on SOFR, SONIA, and Euribor futures should be discounted. Its answer is that discounting still applies because derivative cash flows have time value. It suggests deriving the discount rate from the product's associated…
The document outlines how to model securities lending in an XVA framework, separating the security and collateral principal legs, lending-fee cash flows, and the haircut cushion. It recommends carrying the security leg at its borrow or repo rate and…
The document explains the 1/1 day count fraction as a way to express an absolute interest amount rather than interest that accrues in proportion to elapsed time. In its example, a loan of $100 at a 5% rate produces $5 of interest for the period, whatever its…
The document identifies the displayed linear model of price changes as the Augmented Dickey–Fuller (ADF) regression. It explains the simpler Dickey–Fuller idea: estimate how the current change in a series relates to its previous level. A negative coefficient…
The document describes an accrual-style valuation of a total return swap with an index underlying. The asset leg reflects the index’s percentage change since the last reset, applied to an adjusted notional, while accrued coupon and financing amounts use the…
This question reports an error when valuing a forward rate agreement with QuantLib after changing its value date. The accepted answer identifies the missing input: the ForwardRateAgreement constructor accepts an optional discount curve, and the example…
The document explains why a short deposit quote and a curve’s zero rate can differ even when they refer to the same maturity. A deposit rate is simply compounded: principal grows by the rate multiplied by the accrual fraction. The curve in the example stores…
The document considers how to choose the beta parameter in SABR when using swaption volatility smiles to price a constant maturity swap. The example uses European payer and receiver swaptions to replicate the CMS value, with SABR used to interpolate and…
The document explains the meaning of a lagged interest rate in a time-series plot. A lag is a past observation aligned with a later date: with a one-period lag, the rate from the previous observation is paired with the current observation. For example, if…
The document asks how to estimate future distributions from a bond ETF when monthly payouts do not necessarily match the interest income received by the fund in the same month. The response gives a direct practical approach: inspect the ETF’s holdings and…
The document asks whether the time-dependent drift level in a Cox–Ingersoll–Ross short-rate model can be chosen to fit observed zero-coupon bond prices or forward rates, analogously to the Hull–White model. It introduces the CIR short-rate process, the…
The document distinguishes calculating a bond’s yield to maturity from realizing that yield as an investor. YTM is the discount rate that equates a bond’s dirty price with the present value of its scheduled cash flows. Solving that equation does not require…
The document examines whether credit default swap spreads should be similar when quoted in different currencies. Its central point is that currency denomination can change the value of a default-contingent payment when the reference entity’s default is…
The document answers why SONIA retained its name after reform while EONIA was replaced by the euro short-term rate, €STR. It clarifies that both benchmarks were reformed; the distinction is chiefly one of naming. The reformed sterling benchmark continued…
The document distinguishes month-based schedule generation, which preserves a calendar roll date, from fixed-day periods, which advance by a constant number of days and therefore shift the calendar date. The example shows successive 91-day coupon periods in…
The document explains why a bank’s fixed mortgage rates across different terms cannot be read directly as forecasts of future central bank rates. Mortgage pricing includes the lender’s funding cost, borrower default risk, embedded options, administration…
The document explains several ways insurance companies use interest rate swaps: managing exposure to rate movements, adjusting portfolio duration, and hedging inflation or liabilities linked to variable and indexed annuities. It also describes a case in…
The document considers whether regression results depend on the base year of an index or on mixing indexed and non-indexed series. It says the choice of index base is generally a rescaling and does not by itself determine whether a regression is appropriate.…