What is the process of comparing a mutual fund's performance against market indices known as?

Which index provides a more comprehensive view of a fund's performance by considering both capital appreciation and dividends?

What was the primary metric used to evaluate mutual fund performance before the shift to Total Return Index?

How has the introduction of Total Return Index (TRI) impacted the transparency and credibility of mutual funds?

What should an investor do if their previously outperforming fund starts underperforming after the implementation of TRI?