When should you make changes in your mutual fund portfolio?

A combination of scheme categorisation, economic downturn, and market downturn, coupled with negative news on the NBFC sector and couple of frauds, has created mayhem, in the market which led to underperformance of many mutual fund schemes.

from Wealth-Economic Times https://economictimes.indiatimes.com/wealth/invest/when-should-you-make-changes-in-your-mutual-fund-portfolio/articleshow/72139006.cms