SEBI's October 2017 circular introduced comprehensive mutual fund categorisation, replacing the earlier 60+ categories with 36 standardised categories across equity, debt, hybrid, and solution-oriented schemes. The rationalisation mandated uniform naming conventions, eliminated category overlap, and required fund houses to merge or wind up non-compliant schemes. Implementation deadline was January 2018, with subsequent updates addressing ESG funds, multi-asset allocation, and flexi-cap definitions. This framework enhanced investor clarity and comparability across fund houses.

The 2017 rationalisation addressed market fragmentation where fund houses created similar products with different names, confusing investors. SEBI streamlined categories into logical buckets - equity funds by market cap and investment style, debt funds by duration and credit quality, hybrid funds by asset allocation ratios. Key changes included mandatory 65% equity exposure for tax benefits, flexi-cap replacing diversified equity, and strict asset allocation bands for hybrid categories. The circular also standardised benchmark indices, portfolio disclosure norms, and exit loads. Updates have refined definitions - flexi-cap funds (minimum 65% equity across market caps), ESG fund criteria, and multi-asset allocation requirements. This framework enables better performance comparison, reduces mis-selling, and aligns product features with investor expectations. Fund houses had to merge duplicate schemes, leading to industry consolidation and clearer product positioning.