New Delhi, July 4 -- Indian equity mutual funds have delivered strong returns over the past decade, but the biggest winners haven't come from every category or every fund house. Instead, the top of the SIP return charts is dominated by a handful of small-cap and mid-cap schemes, with a few asset management companies (AMCs) repeatedly producing the best-performing funds across multiple investment horizons.

An analysis of SIP returns across three-, five- and 10-year periods reveals a clear pattern. Small-cap funds dominate the long-term rankings, mid-cap schemes have led over shorter investment horizons, and fund houses such as Invesco, Quant and Nippon India feature consistently among the top performers.

Invesco India Mid Cap Fund emerge...