import type { array, matrix } from "../types";
/**
 * Sterling Ratio.
 *
 * A risk-adjusted performance measure like Calmar ratio but the denominator is
 * the largest consecutive drawdown (excluded the 10% excess in the original formula).
 * Sterling Ratio = (Annualized Return - Risk Free Rate) / Largest Drawdown
 *
 * @param x asset/portfolio returns
 * @param frisk annual free-risk rate (def: 0)
 * @param t frequency of data. 1: yearly, 4: quarterly, 12: monthly, 52: weekly, 252: daily (def: 252)
 * @param dim dimension 0: row, 1: column (def: 0)
 * @return Sterling Ratio
 *
 * @example Single asset sterling ratio
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * var x = [0.003,0.026,0.015,-0.009,0.014,0.024,0.015,0.066,-0.014,0.039];
 * assertEquals(sterlingratio(x,0,12), 16.701048718978136);
 *
 * ```
 *
 * @example Multiple assets sterling ratios
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * var x = [0.003,0.026,0.015,-0.009,0.014,0.024,0.015,0.066,-0.014,0.039];
 *
 * var y = [-0.005,0.081,0.04,-0.037,-0.061,0.058,-0.049,-0.021,0.062,0.058];
 * assertEquals(sterlingratio(x,0,12), 16.701048718978136);
 * assertEquals(sterlingratio(y,0,12), 1.3190010333058182);
 * ```
 */
export default function sterlingratio(x: array, frisk?: number, t?: number, dim?: 0 | 1): number;
/**
 * Sterling Ratio.
 *
 * A risk-adjusted performance measure like Calmar ratio but the denominator is
 * the largest consecutive drawdown (excluded the 10% excess in the original formula).
 * Sterling Ratio = (Annualized Return - Risk Free Rate) / Largest Drawdown
 *
 * @param x asset/portfolio returns
 * @param frisk annual free-risk rate (def: 0)
 * @param t frequency of data. 1: yearly, 4: quarterly, 12: monthly, 52: weekly, 252: daily (def: 252)
 * @param dim dimension 0: row, 1: column (def: 0)
 * @return Sterling Ratio
 *
 * @example Single asset sterling ratio
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * var x = [0.003,0.026,0.015,-0.009,0.014,0.024,0.015,0.066,-0.014,0.039];
 * assertEquals(sterlingratio(x,0,12), 16.701048718978136);
 *
 * ```
 *
 * @example Multiple assets sterling ratios
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * var x = [0.003,0.026,0.015,-0.009,0.014,0.024,0.015,0.066,-0.014,0.039];
 *
 * var y = [-0.005,0.081,0.04,-0.037,-0.061,0.058,-0.049,-0.021,0.062,0.058];
 * assertEquals(sterlingratio(x,0,12), 16.701048718978136);
 * assertEquals(sterlingratio(y,0,12), 1.3190010333058182);
 * ```
 */
export default function sterlingratio(x: matrix, frisk?: number, t?: number, dim?: 0 | 1): array | matrix;
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