Contents
Definition
The Nifty Midcap 100 is a free-float market capitalisation-weighted equity index maintained by NSE Indices Limited (formerly India Index Services and Products Limited — IISL). It tracks the performance of the 100 companies ranked 101st to 200th by free-float market capitalisation among all stocks listed on NSE, based on the eligible universe defined in the NSE Index Methodology document. The SEBI-AMFI large/mid/small-cap categorisation circular (SEBI/HO/IMD/DF3/CIR/P/2017/114, 2017) mandates that AMFI publish a bi-annual list (January and July) ranking all listed stocks by full market cap; the top 100 are classified as Large Cap, the next 150 (101-250) as Mid Cap, and beyond as Small Cap. The Nifty Midcap 100 draws from the 101-200 rank band of this AMFI-SEBI list, representing the core midcap universe tracked by SEBI-categorised midcap equity funds.
How it is structured
Index construction follows the NSE Nifty Midcap 100 Index Methodology (available at niftyindices.com). Key parameters:
- Constituent count: Fixed at 100 stocks.
- Eligibility: Listed on NSE CM segment, ranked 101-200 by AMFI semi-annual free-float mcap, trading frequency ≥90% of days in the past 6 months, impact cost ≤0.50% for ₹5 crore trade.
- Weighting: Free-float market capitalisation weighted with individual constituent weight capped at 10% and group cap at 25%.
- Rebalancing: Semi-annual in January and July, aligned with AMFI reclassification dates; stocks that migrate to large-cap (top 100) or drop to small-cap exit the index.
- Base: 1 January 2003, Base value = 1,000.
Total Returns Index (TRI) variants incorporate dividends and are the mandated benchmark for SEBI-regulated midcap funds.
What investors should look at
Factual framework when using Nifty Midcap 100 as a reference:
- Index vs AMFI band: The index covers ranks 101-200, while SEBI's "mid cap" classification covers 101-250. A SEBI-compliant midcap fund has a wider eligible universe (150 stocks) than the index's 100 — the fund's holdings beyond rank 200 may not appear in index constituent lists.
- Benchmark usage: SEBI requires midcap equity funds to benchmark against Nifty Midcap 150 TRI or S&P BSE Midcap TRI (Tier-1) — not Nifty Midcap 100 — though Nifty Midcap 100 is frequently used in marketing. Verify the official scheme benchmark in the SID.
- Volatility profile: Midcap indices historically exhibit higher beta to broad market versus large-cap indices and lower liquidity during risk-off periods.
- Rebalancing impact: Semi-annual reviews can cause significant index-level rebalancing trades (graduation to Nifty 50 or relegation to smallcap) — relevant for passive index fund investors tracking this index.
Worked example
During the AMFI July 2023 rebalancing, several companies that had grown in market cap — such as certain auto ancillary and pharma midcaps — graduated to the large-cap (top 100) rank band and exited Nifty Midcap 100 constituents. Simultaneously, small-cap companies that appreciated in price entered the 101-200 band and were added to the index. An ETF or index fund tracking Nifty Midcap 100 must replicate these changes by the rebalancing effective date. Passive investors in such funds incur rebalancing turnover cost; active midcap fund managers use the event as a reference to assess which stocks are transitioning market-cap bands.
See also
- Nifty Smallcap 250 Index
- Mid Cap Fund — SEBI Equity Category
- Large Cap Fund — SEBI Equity Category
- Mutual Funds Overview
- Motilal Oswal Nifty Midcap 100 ETF
Primary source
NSE Nifty Midcap 100 Index Methodology, NSE Indices Limited (niftyindices.com); SEBI/HO/IMD/DF3/CIR/P/2017/114 (2017) — large/mid/small-cap AMFI classification framework; AMFI bi-annual market-cap list (amfiindia.com). MintByte content is for informational purposes only and does not constitute investment advice. MintByte is registered with AMFI as ARN-314872 and with APMI as APRN-01658.