The BWP is a financial tool used to measure the performance of investments. It is calculated by taking the weighted average of a portfolio's returns over a certain time period. This can help investors compare how their investments have performed relative to a benchmark portfolio. It also helps investors identify which investments have been performing better or worse and helps them make more informed decisions about the portfolio. The BWP can be used to monitor and compare the performance of different investments over time and can provide insights for portfolio rebalancing.