# Known Use Cases (KUC) Total: **35** ## `KUC-101` **Source**: `Python/test/test_marketelements.py` Verifies that market quotes (SimpleQuote) properly notify registered observers when their values change, ensuring reactive pricing systems work correctly. ## `KUC-102` **Source**: `Python/test/test_americanquantooption.py` Tests finite difference method pricing for American quanto options, which have payoff dependent on both equity and foreign exchange movements. ## `KUC-103` **Source**: `Python/test/test_basket_option.py` Validates pricing of basket options involving multiple underlying assets and spread options, which are used for correlation trading and cross-asset strategies. ## `KUC-104` **Source**: `Python/test/test_cms.py` Tests CMS (Constant Maturity Swap) pricing engines that handle swap-rate based coupons, used in structured products and interest rate derivatives. ## `KUC-105` **Source**: `Python/test/test_bonds.py` Tests fixed rate bond pricing with scheduled coupon payments, used for government and corporate bond valuation and analysis. ## `KUC-106` **Source**: `Python/test/test_bondfunctions.py` Tests bond analytics functions including yield calculation, duration, convexity, and other fixed income risk measures. ## `KUC-107` **Source**: `Python/test/test_termstructures.py` Tests yield term structure creation, interpolation methods, and forward rate calculations essential for pricing each interest rate derivatives. ## `KUC-108` **Source**: `Python/test/test_options.py` Tests finite difference method pricing for options under Heston Hull-White stochastic volatility model, capturing equity-interest rate correlation. ## `KUC-109` **Source**: `Python/test/test_calendars.py` Tests joint calendar functionality combining multiple country calendars to determine valid business days for cross-border trading. ## `KUC-110` **Source**: `Python/test/test_sabr.py` Tests SABR (Stochastic Alpha, Beta, Rho) volatility model for smile fitting in interest rate and FX markets. ## `KUC-111` **Source**: `Python/test/test_volatilities.py` Tests swaption volatility term structure handling for interest rate derivatives pricing and calibration. ## `KUC-112` **Source**: `Python/test/test_futures.py` Tests perpetual futures pricing models used in cryptocurrency exchanges for continuous futures contracts without expiration. ## `KUC-113` **Source**: `Python/test/test_currencies.py` Tests currency class construction including default, standard (EUR), and bespoke currencies for multi-currency instrument pricing. ## `KUC-114` **Source**: `Python/test/test_swap.py` Tests interest rate swap pricing engines with historical rate fixings, used for vanilla IRS valuation and curve bootstrapping validation. ## `KUC-115` **Source**: `Python/test/test_integrals.py` Tests numerical integration methods used in pricing analytics for computing expected values and option premiums. ## `KUC-116` **Source**: `Python/test/test_swaption.py` Tests swaption pricing with various settlement types and calculates Greeks for interest rate option risk management. ## `KUC-117` **Source**: `Python/test/test_ode.py` Tests ordinary differential equation solvers (Runge-Kutta) used in pricing models for term structure evolution and boundary value problems. ## `KUC-118` **Source**: `Python/test/test_slv.py` Tests Stochastic Local Volatility (SLV) process generation combining Heston stochastic vol with local vol for more accurate calibration. ## `KUC-119` **Source**: `Python/test/test_coupons.py` Tests Ibor index coupon construction and floating leg generation for interest rate derivatives including rate averaging methods. ## `KUC-120` **Source**: `Python/test/test_fdm.py` Tests finite difference method meshers and solvers used for PDE-based option pricing across various boundary conditions. ## `KUC-121` **Source**: `Python/test/test_daycounters.py` Tests day count conventions including Business252 used for interest accrual calculations in Brazilian and other markets. ## `KUC-122` **Source**: `Python/test/test_ratehelpers.py` Tests rate helpers used in bootstrapping yield curves from market instruments like deposits, futures, and swaps. ## `KUC-123` **Source**: `Python/test/test_fxforward.py` Tests FX forward pricing with cross-currency discount curves, used for currency hedging and FX derivative valuation. ## `KUC-124` **Source**: `Python/test/test_solvers1d.py` Tests root-finding algorithms (Brent, Bisection, Secant, etc.) used for implied volatility calculation and calibration. ## `KUC-125` **Source**: `Python/test/test_extrapolation.py` Tests Richardson extrapolation for improving numerical accuracy, used in pricing model convergence acceleration. ## `KUC-126` **Source**: `Python/test/test_equityindex.py` Tests equity index valuation with dividend yields and interest rates, used for index derivative pricing. ## `KUC-127` **Source**: `Python/test/test_instruments.py` Tests instrument observability pattern for stocks, ensuring market data changes properly propagate through to instrument valuations. ## `KUC-128` **Source**: `Python/test/test_linear_algebra.py` Tests array and matrix operations used throughout QuantLib for numerical computations in pricing and risk models. ## `KUC-129` **Source**: `Python/test/test_date.py` Tests date arithmetic operations including periods, schedules, and date adjustments used throughout financial calculations. ## `KUC-130` **Source**: `Python/test/test_blackformula.py` Tests Black-Scholes-Merton formula implementation for vanilla option pricing, the foundational model for equity derivatives. ## `KUC-131` **Source**: `Python/test/test_inflation.py` Tests inflation term structures and CPI index handling for inflation-linked derivatives like inflation swaps and bonds. ## `KUC-132` **Source**: `Python/test/test_money.py` Tests Money class comparison and arithmetic operations for proper handling of multi-currency quantities. ## `KUC-133` **Source**: `Python/test/test_capfloor.py` Tests cap and floor pricing engines for interest rate risk management, used for hedging rate movements and callable structures. ## `KUC-134` **Source**: `Python/test/test_settings.py` Tests global settings management including evaluation date control and fixing behavior configuration. ## `KUC-135` **Source**: `Python/test/test_iborindex.py` Tests Ibor index fixing management and historical fixings handling for floating rate instruments.