finance-solution 0.4.1

Finance math: TVM, cashflow, amortization, equity path metrics, technical analysis (SMA/EMA/WMA/HMA/MACD/BB/Keltner/Donchian/Stoch/VWAP/RVOL/RSI/ATR/LinReg), and options (BSM, Black76, GK, CRR American) with Result-only APIs, solutions, tables, and incremental state.
Documentation 
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//! Educational doubling-time helpers: Rule of 72 / 69 / 70 and exact formulas.
//!
//! Use [`doubling_solution`] for a full comparison at one rate (formulas + table),
//! or [`doubling_compare_rates`] to see how approximations behave across rates.
//!
//! All public functions return [`crate::FinanceResult`] (Result-only API, v0.1+).
pub mod rule_of_72;

#[doc(inline)]
pub use rule_of_72::*;