Is Nifty mid-cap momentum index a smart bet?

Smart-beta indices are quietly making waves, with some delivering standout returns. One such index is the Nifty Midcap 150 Momentum 50, which picks 50 companies with the strongest momentum from its parent index, the Nifty Midcap 150.

To evaluate momentum, the index examines each stock’s six- and 12-month price performance, adjusts it for volatility and then assigns a momentum score. The top scorers make the cut, with weights based on both score and market capitalisation.

Performance

In the long run, the Nifty Midcap 150 Momentum 50 Index has consistently outpaced its parent benchmark, even delivering outsized returns in certain periods.

But when markets fall, it stumbles harder. Its downside capture ratio, which shows how much it falls when the market falls, is over 118 per cent—meaning it tends to fall 1.18 per cent for every 1 per cent dip in the parent index. And its standard deviation (volatility level) is nearly three percentage points higher than its benchmark, making it a classic case of high return, high anxiety.

The bottom line

There’s no denying that the Nifty Midcap 150 Momentum 50 looks promising. But momentum in mid caps brings sharp swings and steeper drawdowns, often eroding gains made during bullish phases. Add to that the challenge of managing large AUMs under such a strategy, and the real-world results are bound to differ from back-tested charts.

In short, the index is for high-risk investors who are comfortable with frequent portfolio churns. The core of your portfolio should still rest on diversified, long-term holdings that let you sleep well through market noise.

This article was originally published on October 27, 2025.