Picture a food court with twenty stalls. You pick one stall, say the biryani counter, and spend your entire lunch budget there. On most days the biryani is excellent and you go home happy. But the day the rice delivery is late, you have nothing to eat. A sectoral fund works exactly like that one-stall bet: you put money into a single industry, say defence or information technology, and your returns rise or fall with that one kitchen. The Nifty Defence index was up roughly 23% year-to-date as of June 2026 (Business Standard, June 18, 2026), while the Nifty IT index had fallen close to 19.9% over the same period. Same market, same year, two completely different outcomes.<\/p>\n\n\n\n
A sectoral fund is a mutual fund that invests all or almost all of its corpus in companies from a single industry. SEBI mandates that sectoral and thematic funds invest at least 80% of total assets in stocks from a particular sector, so examples include funds focused entirely on banking, pharmaceuticals, infrastructure, technology, or defence. Because there is no built-in diversification across industries, the fund’s performance mirrors the fortunes of that one sector very closely, which is both its biggest attraction and its most significant risk.<\/p>\n\n\n\n
A diversified equity fund, by contrast, spreads its bets across many industries so that when IT struggles, the fund’s exposure to pharma or consumer goods cushions the fall. A sectoral fund has no such cushion, and that is the core difference explaining why sectoral funds can thrill investors in good years and cause real damage in bad ones. In fact, the gap between the best and worst performing sector in any given year in India has historically been wider than most investors expect.<\/p>\n\n\n\n
The 2026 Defence-versus-IT contrast is a near-perfect classroom example of concentration risk playing out in real time. India’s defence production touched Rs 1.78 lakh crore in FY2026, a 15.6% jump year-on-year (Ministry of Defence, June 17, 2026), and government orders, rising geopolitical tensions, and the push for domestic manufacturing created strong tailwinds for listed defence companies. Several defence stocks gained over 100% between April and June 2026 alone (Business Standard, June 18, 2026), meaning funds exposed entirely to defence rode that wave with full force.<\/p>\n\n\n\n
IT funds, on the other hand, faced the opposite wind as global technology spending slowed and demand from large clients grew cautious. The Nifty IT index lost close to 19.9% over the past year continuing into June 2026, and investors in pure IT sectoral funds absorbed that pain with no offset from other industries in the portfolio. The key point here is that this is not an IT-specific story, because the same pattern has played out repeatedly across sectors in Indian markets over many cycles.<\/p>\n\n\n\n
Sectoral funds have a legitimate role in a well-constructed portfolio, but that role is specific and limited. Think of your overall equity portfolio as a cricket batting lineup where your core diversified funds are the reliable middle-order batsmen, consistent and carrying the bulk of the innings, while sectoral funds are the lower-order hitters who can change a match when conditions suit them but would never be asked to anchor the innings. Of course, you would never build the entire team strategy around them either.<\/p>\n\n\n\n
The standard guidance among financial planners is to cap sectoral or thematic fund exposure at around 10% to 15% of your total equity allocation, which means that if you have Rs 10 lakh in equity mutual funds, no more than Rs 1 lakh to Rs 1.5 lakh should sit in sectoral funds at any point. This structure preserves your ability to benefit from a sector tailwind while ensuring a bad year in one industry does not derail your entire financial plan.<\/p>\n\n\n\n