import { TimeWeightedReturnOptions } from '../schemas/TimeWeightedReturnOptionsSchema';
import { TimeWeightedReturnResult } from '../schemas/TimeWeightedReturnResultSchema';
/**
 * Calculate Time-Weighted Return (TWR)
 *
 * TWR measures portfolio performance independent of cash flows.
 * It eliminates the impact of timing and size of contributions/withdrawals.
 *
 * Formula: TWR = ∏(1 + r_i) - 1
 * where r_i = (V_i - V_{i-1} - CF_i) / (V_{i-1} + CF_i)
 *
 * @param options - Portfolio values, cash flows, and annualization factor
 * @returns TWR result with period and annualized returns
 *
 * @example
 * ```typescript
 * const twr = calculateTimeWeightedReturn({
 *   portfolioValues: [1000, 1100, 1200, 1150],
 *   cashFlows: [0, 100, -50, 0],
 *   annualizationFactor: 252
 * });
 * ```
 */
export declare function calculateTimeWeightedReturn(options: TimeWeightedReturnOptions): TimeWeightedReturnResult;