Summarise Performance Metrics by Ticker

Computes annualised return, annualised volatility, and Sharpe ratio (assuming zero risk-free rate) for each ticker. Validates input and handles edge cases (zero volatility, missing returns).

Usage

summarise_performance(returns)

Arguments

returns

A tibble returned by get_stock_returns().

Value

A tibble with columns: symbol, ann_return, ann_vol, sharpe.