Sectoral indices track the performance of a specific group of stocks belonging to the same industry — for example, Nifty Bank covers banking stocks, Nifty IT covers information technology companies, and Nifty Pharma covers pharmaceutical firms. These indices give you a quick read on how an entire industry is doing without needing to look at individual stocks. NSE maintains over a dozen sectoral indices, and they are rebalanced periodically to reflect changes in the industry landscape.

There is no single sector that always outperforms — it depends on the economic cycle. Banking and financial services tend to do well when interest rates are stable and credit growth is strong. IT stocks often rally when the rupee weakens since they earn in dollars. Pharma tends to be defensive and holds up during market downturns. Over the past decade, financials and IT have been the largest wealth creators, but past performance is never a guarantee. The best approach is to track sector rotation and understand what macro factors are driving each industry.

You have a few options. The simplest is buying a sectoral ETF or index fund — for example, a Nifty Bank ETF gives you exposure to all major banking stocks in one trade. You can also buy individual stocks within a sector if you want to be more selective. Another route is sectoral mutual funds, though these tend to have higher expense ratios than ETFs. Keep in mind that sector-specific investments are inherently concentrated, so they carry more risk than diversified funds.