Chapter 3 of 12 · 14 min
How the Indian stock market works
NSE, BSE, SEBI, Sensex, Nifty, demat — the machinery behind the screen.
When you tap "buy" on a stock app, a remarkable machine whirs into motion. Knowing its parts removes the fear — and helps you spot when something is *not* legitimate.
The two exchanges: NSE and BSE
India has two main stock exchanges, both in Mumbai. The BSE (Bombay Stock Exchange), founded 1875, is Asia's oldest. The NSE (National Stock Exchange), founded 1992, today handles most of India's trading volume. Most large companies are listed on both — the same share, two marketplaces, nearly identical prices.
The referee: SEBI
The Securities and Exchange Board of India (SEBI) is the government regulator. It licenses brokers, forces companies to publish their accounts, investigates fraud, and fines manipulators. Rule of thumb: if a person or platform touching your money is not SEBI-registered, walk away. You can verify any broker or adviser's registration on sebi.gov.in.
The scoreboards: Sensex and Nifty
News anchors say "market is up today" — what they mean is an index went up. An index is just an average of selected stocks: the Sensex tracks 30 large BSE companies; the Nifty 50 tracks 50 large NSE companies. They are thermometers for overall market mood, nothing more. There are also Shariah indices — the Nifty50 Shariah and S&P BSE 500 Shariah — which track only stocks passing Islamic screens.
Your three accounts
- Bank account — where your money sits. Already have it.
- Demat account — an electronic locker that holds your shares (de-materialised — no paper certificates since the 1990s). Maintained by depositories NSDL or CDSL.
- Trading account — your gateway to the exchange, opened with a SEBI-registered broker (Zerodha, Groww, Upstox, Angel One…). It moves money from your bank, executes the trade, and parks the shares in your demat.
In practice you open all three linked together in one online sign-up with a broker — about 15 minutes with your PAN card and Aadhaar.
What happens when you press Buy
- Your order goes from the broker to the exchange's computers.
- The exchange matches you with someone selling at your price.
- The trade is confirmed in under a second.
- Money leaves your account; shares arrive in your demat by the next working day (T+1) — guaranteed by a clearing corporation so neither side can cheat.
☪️ Is the machinery itself halal?
Buying and selling at an openly negotiated price, with instant matching, transparent records and guaranteed delivery, is a clean, honest marketplace — arguably one of the most transparent bazaars ever built. Issues arise with *specific products* offered on it (futures and options, margin trading with interest, short selling) — Chapter 9 deals with those. Plain delivery-based buying of equity shares uses none of them.
🛠 Build the skill — 10 minutes
- Visit nseindia.com and search one company you know (e.g. TCS).
- Find: its last traded price, the day's high/low, and its market cap.
- Look up the same company on bseindia.com and compare the price — see how close the two exchanges are.
📌 Remember
- NSE and BSE are marketplaces; SEBI is the referee; Sensex/Nifty are scoreboards.
- You need a broker-opened trading + demat account; setup is ~15 minutes online.
- Settlement is T+1 and guaranteed — delivery-based equity buying has no hidden interest in its plumbing.
- Shariah indices already exist for the Indian market.
✅ Check yourself
5 quick questions — answer honestly, learn instantly.
1. Where do your shares actually live after you buy them?
2. News says "Sensex crashed 900 points today". This literally means…
USE CASE3. A Telegram "adviser" asks you to transfer money to his personal account to "invest on your behalf". The deal-breaker is…
4. You sell shares on Tuesday. When does the money/shares exchange fully settle?
5. The Nifty50 Shariah index differs from the regular Nifty 50 because it…