🔄 Sectors and the business cycle in India

🎯 In 30 seconds: A sector is a group of companies that earn money in similar ways, so the same forces push their profits up or down. In India, banks and financial companies are by far the largest sector in the Nifty 50. Some sectors are cyclical (metals, autos, cement, capital goods, banks to a degree): their profits swing hard with the economy. Others are defensive (FMCG, pharma, utilities): people keep buying their products in bad times. Knowing which sector a company is in, and what drives that sector, tells you which news should move it. Trying to time the switch from one sector to another is much harder than the textbook makes it look.

What a sector is

Think of a weekly sabzi mandi. When the monsoon fails, every vegetable seller feels it at once, whatever their skill. When a new metro station opens nearby, every stall gets more footfall. Their fortunes are tied by the same weather and the same customers.

Listed companies are grouped the same way. A cement maker in Rajasthan and one in Andhra Pradesh both depend on construction activity, coal and pet-coke prices, freight costs and the monsoon (which stops building work for months). Knowing the sector tells you which numbers to watch.

NSE Indices classifies every listed company in four levels, from broad to narrow: macro-economic sector, sector, industry and basic industry. Its July 2023 guideline lists 12 macro-economic sectors, 22 sectors, 59 industries and 197 basic industries. NSE and BSE moved to a common industry classification in 2022, so the two exchanges now describe a company's business in the same terms. A company is placed by its main source of revenue.

The sector map of the Indian market

India's index weights are lopsided. The Nifty 50 factsheet of 30 September 2026 showed these sector weights:

More than a third of the main index is banks, NBFCs and insurers. When people say "the market fell today", it often means the banks fell. An index fund on the Nifty 50 is a heavier bet on Indian lending than many beginners realise. Diversification and correlation comes back to this.

NSE Indices also runs sectoral indices that track one sector each: Nifty Bank, Nifty Private Bank, Nifty PSU Bank, Nifty Financial Services, Nifty IT, Nifty FMCG, Nifty Auto, Nifty Metal, Nifty Pharma, Nifty Healthcare, Nifty Realty, Nifty Media, Nifty Oil and Gas, Nifty Energy and others. BSE has its own sector indices. Comparing a sector index with the Nifty 50 over a year shows you which parts of the market led and lagged.

Cyclical vs defensive: the arithmetic behind it

Two things make a company cyclical. Its sales swing with the economy (people delay buying cars and houses in bad times, but not soap). And its costs are mostly fixed (a steel plant costs nearly as much to run at 60% capacity as at 90%). The second effect is called operating leverage.

Take two hypothetical companies, each with ₹1,000 crore of revenue and ₹150 crore of operating profit:

• Sundar Soaps (FMCG): fixed costs ₹100 crore; variable costs 75% of sales.
• Lohit Steel (metals): fixed costs ₹400 crore; variable costs 45% of sales.

Same starting profit, very different risk. And in a real slowdown, steel revenue would likely fall much more than soap revenue, because steel prices and volumes both drop. Combine the two effects and a cyclical company's profit can almost vanish in a bad year, then double in a good one. That is why, as Valuation ratios showed, P/E is a poor guide for cyclicals: it looks lowest at the peak.

What drives the main Indian sectors

Each sector has a few numbers that matter more than any others. This table is a starting map, not a complete list.

A few of these need more explanation.

IT and the rupee. Indian IT companies bill clients mostly in US dollars, euros and pounds, but pay most salaries in rupees. Suppose a hypothetical IT firm earns 100 million US dollars in a quarter. At ₹85 to the dollar that is ₹850 crore. If the rupee weakens to ₹88, the same work brings in ₹880 crore, about 3.5% more, while rupee salaries stay the same. So a weaker rupee usually helps IT margins, and a stronger rupee hurts. Companies hedge part of this, so the effect is smaller and slower than the raw arithmetic.

Banks and the credit cycle. Under RBI's prudential norms, a loan generally becomes a non-performing asset (NPA) when interest or principal is overdue for more than 90 days. In good years, banks lend freely and bad loans look low. When the economy turns, some borrowers stop paying, banks must set aside money (provisions) against those loans, and profits fall. Indian banks lived through a long bad-loan cycle in the 2010s. The lesson for readers of bank results: look at gross and net NPAs, provisions and the loans that have been restructured, not just profit.

FMCG and the monsoon. Farm incomes depend heavily on the monsoon, and rural spending follows farm incomes. A good monsoon tends to lift rural spending on soap, biscuits, two-wheelers and tractors. A weak one does the reverse. FMCG companies report volume growth (how much more they sold) separately from price increases. Volume is the cleaner sign of demand.

PSU shares. Public sector undertakings are companies in which the central or a state government holds a controlling stake: many banks, oil marketers, power utilities, miners and defence manufacturers. NSE runs indices such as Nifty PSU Bank and Nifty CPSE for them. They have their own drivers: government policy on prices and dividends, plans to sell part of the government stake (disinvestment), and lending or pricing decisions made partly for public goals. They often pay high dividends and trade at low P/Es. That may be a bargain, or it may reflect the risk that the majority owner's goals differ from yours.

The business cycle

Economies move in uneven waves: expansion, peak, slowdown, trough, recovery. India's cycle is shaped by some forces that matter less in developed markets: the monsoon, crude oil prices (India imports most of the oil it uses), government capital spending announced in the Union Budget, and flows of foreign portfolio money. The RBI raises its policy rate to cool inflation and cuts it to support growth, which feeds straight into bank, auto and real estate shares. The economy and stocks explains how to read these signals.

Cycles do not run on a timetable. Some slowdowns last a few quarters, some years. A shock like the COVID-19 lockdowns in 2020 can compress a whole cycle into months.

Sector rotation: the textbook story

The classic idea: move money between sectors as the cycle turns.

• Early recovery: rates are low and falling. Banks, autos, real estate and consumer discretionary companies tend to lead.
• Mid expansion: capital goods, cement, construction and IT pick up as companies invest.
• Late expansion: commodity prices rise; metals and energy tend to do well. Inflation climbs and the RBI tightens.
• Slowdown: defensives such as FMCG, pharma and utilities hold up better.

Where sector rotation breaks down

The story is tidy. Using it is not.

• Prices move first. Share prices often turn months before the economy does, because investors trade on expectations. By the time GDP data confirms a recovery, cyclical shares may have run up a long way.
• Cycles are only clear afterwards. In real time, a soft quarter could be a pause or the start of a slowdown. Data arrives late and gets revised.
• Sector-specific forces can swamp the cycle. A drug-pricing decision, a change in fuel pricing, a global tech spending boom or a change in rules for one industry can matter more than the economy.
• Costs and taxes add up. Every switch costs brokerage, STT and other charges, and may create short-term capital gains tax. What trading really costs and Taxes have the details.
• Evidence is thin. The rotation story is a pattern people describe after the fact, not a rule with a reliable track record. If you try it, keep a written record of every switch and compare the result, after costs and tax, with simply holding a Nifty index fund.

How to use sectors in practice

1. Label every holding. Write down the sector of each share you own or watch, using the NSE classification shown on the company's quote page.
2. Add up your exposure. If 60% of your money is in banks and NBFCs, a single bad-loan cycle can hit most of your portfolio at once.
3. Learn the two or three numbers per sector. Use the table above. For a bank, read NPAs and margins. For an auto company, read monthly sales. For an IT company, read deal wins and the rupee.
4. Compare with the sector, not just the market. A pharma share up 10% in a year when Nifty Pharma rose 25% has lagged its peers.
5. Value cyclicals across the cycle. Average their earnings over several years before judging the P/E.

Try it

1. Download the latest Nifty 50 factsheet from the NSE Indices website. Write down the date and the top three sector weights. Compare them with the 30 September 2026 numbers above.
2. Pick three sectoral indices: Nifty Bank, Nifty FMCG and Nifty Metal. On the NSE website, note each one's return over the last year, and the Nifty 50's.
3. For each sector, write one line on what you think drove that return, using the table of drivers above. Then check by reading one large company's latest results press release in that sector.
4. Do the Lohit Steel arithmetic for a 20% fall in revenue. (Answer: revenue ₹800 crore, variable costs ₹360 crore, fixed costs ₹400 crore, operating profit ₹40 crore, down 73%.)

Sources

• NSE Indices: Nifty 50 factsheet (sector weights as of 30 September 2026)
• NSE Indices: Industry Classification Guideline, July 2023
• NSE: Industry classification
• NSE Indices: Sectoral index factsheets
• RBI: Master Circular on Prudential norms on Income Recognition, Asset Classification and Provisioning (RBI/2024-25/13)
• RBI: Financial Stability Report
• SEBI circular, 26 February 2026: Categorization and Rationalization of Mutual Fund Schemes (sectoral fund rule)
• Petroleum Planning and Analysis Cell (PPAC)