Nifty MidSmallcap 400
Nifty MidSmallcap 400 is an NSE index that combines the Nifty Midcap 150 and the Nifty Smallcap 250 into a single 400-stock benchmark, providing a comprehensive representation of the mid-cap and small-cap segments of the Indian equity market.
The Nifty MidSmallcap 400 was designed as a composite index that allowed investors, fund managers, and index product providers to track the combined performance of the mid-cap and small-cap universe without needing two separate benchmarks. Since the Nifty 500 included both the Nifty 50 and the mid+small universe, the MidSmallcap 400 effectively represented everything in the Nifty 500 below the top 100 companies by market capitalisation.
The construction was straightforward: the index was the union of Nifty Midcap 150 (ranks 101-250) and Nifty Smallcap 250 (ranks 251-500), both ranked by free-float market capitalisation of NSE-listed securities. Each component retained its free-float weighted methodology. The combined 400 constituents underwent semi-annual rebalancing, aligned with the broader NSE Indices rebalancing calendar in March and September.
In the Indian asset management industry, the Nifty MidSmallcap 400 Total Return Index served as the benchmark for funds mandated to invest across mid and small-cap companies without a large-cap allocation. This was particularly relevant under SEBI's mutual fund categorisation circular of October 2017, which mandated that mid-cap funds invest at least 65% in mid-cap stocks and small-cap funds invest at least 65% in small-cap stocks. A blended mid+small fund could use the MidSmallcap 400 TRI as its performance reference.
Volatility was a defining characteristic of this index. Because it excluded the large-cap cushion, the Nifty MidSmallcap 400 experienced sharper drawdowns during market stress events. During the COVID-19 crash in March 2020 and the mid-cap bear phase of 2018-19, the index fell materially more than the Nifty 50. However, during recovery phases and broad market bull runs — as seen in 2020-2021 and 2023-2024 — the MidSmallcap 400 significantly outperformed large caps, reflecting the higher earnings growth potential and re-rating capacity of smaller companies.
Liquidity management was a practical concern for fund managers benchmarked against this index. While mid-cap names (ranks 101-250) typically had reasonable daily trading volumes, many small-cap names (ranks 251-500) had thin float and low average daily turnover. This meant that large funds tracking or benchmarked against the MidSmallcap 400 faced impact costs when building or liquidating positions, which was a structural disadvantage compared to large-cap mandates where liquidity was ample.
Passive ETF products on the MidSmallcap 400 grew in interest as retail investors sought low-cost exposure to the broader market beyond large caps. However, the liquidity constraints in the small-cap portion of the index created tracking error challenges for ETF managers, as replicating 250 small-cap positions faithfully without moving markets required sophisticated execution strategies and patient accumulation over multiple sessions.