How to Trade News and Events in Indian Markets

What Event Trading Actually Means in Indian Markets

Event trading is taking a position around a scheduled or breaking piece of news that is likely to move price. In India the calendar splits cleanly into two buckets. Scheduled events are known in advance, such as the RBI monetary policy on a fixed date, the Union Budget on 1 February, quarterly company results, monthly auto sales numbers, and US Federal Reserve decisions in the early hours of Indian time. Unscheduled events hit without warning, such as a regulatory order, a block deal, a credit rating downgrade, or geopolitical news.

The important thing for a retail trader is that the market is a discounting machine. By the time you read a headline on a news app, professional desks have often already moved the price. So the question is never just was the news good or bad. The question is was the news better or worse than what the price already assumed. A company can report record profit and still fall 5 percent because the street expected even more. This gap between expectation and reality is where the real money and the real risk sit.

This page focuses on the two events that retail traders meet most often: a single stock quarterly result, using a real dated Infosys example, and the RBI policy day for Bank Nifty. All numbers below are illustrative and rounded to teach the mechanics. They are not a prediction and nothing here is a promise of profit.

A Real Dated Example: The Infosys Q4 FY24 Result on 18 April 2024

Infosys reported its Q4 FY24 results after market hours on Thursday 18 April 2024. The headline numbers were actually soft. Reported revenue and net profit came in a touch below some street estimates, and the company guided for modest constant currency revenue growth of only about 1 to 3 percent for FY25, which is a cautious outlook. On those headlines alone you might expect the stock to fall.

But price does not trade the headline, it trades the surprise versus positioning. Two things mattered more than the soft topline. First, operating margins held up better than feared. Second, the company announced a healthy final dividend and a large share buyback proposal, which signals confidence and returns cash to shareholders. Going into the result the stock had been weak and sentiment was bearish, so a lot of bad news was already in the price. When the actual numbers were not as ugly as feared, the stock reacted positively.

On the next trading session, Friday 19 April 2024, Infosys opened with a strong gap up of roughly 4 percent. The stock had closed near 1420 rupees on 18 April and opened in the 1470 to 1480 zone. That opening candle is the single most important piece of information of the day. A 4 percent gap on a heavyweight like Infosys is large. It tells you the buyers were aggressive at the open. As the session progressed the stock did not hold all of the gap and gave back part of it, which is a textbook gap and fade pattern. Buyers who chased the very first print near the high often ended the day underwater even though the news reaction was positive.

Why Option Buyers Get Crushed on Result Day: IV Crush

Before a known event, option sellers demand a higher price for the risk of a big move. This shows up as elevated implied volatility, or IV. The premium of both calls and puts is inflated. The moment the result is out and the uncertainty is gone, IV collapses, often within minutes of the open. This is IV crush, and it is the single biggest reason new traders lose money buying options into results.

Here is an illustrative single stock example for Infosys around that 18 April 2024 result. Infosys trades in lots, and its F&O lot size is 400 shares. Suppose on the morning before the result the stock is near 1420 and the at the money 1420 call expiring that week is quoting around 45 rupees because IV is jacked up. You buy one lot expecting a positive surprise.

• Cost to buy: 45 rupees premium times 400 shares equals 18,000 rupees, plus charges.
• The result is good and the stock gaps up to 1475, so it is 55 points in the money.
• You might expect the call to be worth at least 55 rupees of intrinsic value, a gain. But with IV crushing back to normal, the same 1420 call may only trade around 60 to 65 rupees instead of the 80 or 90 you imagined.
• Realised gain is roughly 60 minus 45 equals 15 rupees times 400 equals 6,000 rupees gross, far less than the move suggested, and a sharp move against you would have wiped out the whole 18,000.

The point is not the exact numbers, which are illustrative. The point is that being right on direction is not enough when you buy a pre event option. You also need the move to be larger than the premium already implied. This is why many event traders prefer to wait for IV to deflate after the open and then trade the underlying or a debit spread, rather than buy a naked inflated option before the event.

A Worked Nifty Example: Trading the Range Break After RBI Policy

Index events are cleaner than single stocks because liquidity is deep and the spread is tight. Take an RBI policy day. Assume Nifty is trading near 24,000 and the weekly expiry is two days away. Rather than guess the direction before the announcement, you wait for the policy and the Governor commentary, let the first 15 minutes after the news set a high and a low, and then trade the break of that range. The Nifty F&O lot size is 65.

Suppose after the announcement Nifty breaks above the post news range and you buy the 24,000 weekly call at a premium of 120 rupees, one lot. Your view is a continuation toward 24,250. You place a stop where the premium would fall to 70, which is your maximum planned loss on the trade.

If instead the break fails and your stop at 70 is hit, the loss is 50 rupees times 75 equals 3,750 rupees gross plus charges. Notice the risk to reward: you risked 50 points to make 65 points, roughly 1 to 1.3. On an event day where the first move can reverse violently, you must define this before you enter. The numbers above are illustrative and round, and STT on options is charged on the sell side premium, so always confirm exact charges in your own broker contract note.

Expiry Mechanics You Must Respect Around Events

Timing an event near expiry changes everything. Nifty and Bank Nifty index options have weekly and monthly expiries, while single stock options like Infosys are monthly only. As expiry approaches, time decay, known as theta, accelerates. An option you buy the morning of a result that is also expiry week loses value very fast if the stock does not move enough, even if it eventually moves your way a day later.

• Index weekly options give you cheap, short dated exposure but the fastest decay. They are unforgiving if your timing is off by even a few hours.
• Single stock options are monthly, so a result that lands mid month gives you more time value cushion than an index weekly.
• On expiry day itself, an out of the money option can go to near zero in minutes. Never hold a naked OTM option into the close hoping for a reversal.
• Avoid carrying inflated pre event premium overnight unless you have a specific spread structure, because the IV crush at the next open works against a buyer.

A practical rule: if you must take an event position with options as a buyer, prefer a slightly in the money option or a debit spread rather than a far out of the money lottery ticket. The in the money option has more intrinsic value and less of its price exposed to the IV crush, and the spread caps your premium outlay.

How Different Events Typically Move Indian Markets

Every event type has a personality. Knowing which instruments react and roughly how violently helps you size your risk before you ever place a trade. The table below is a general guide, not a rule, and actual reactions depend on what the price already assumed.

Notice that results hit one stock hardest, while macro events like RBI and the Fed move the whole index. That changes your instrument choice. For a single result, you trade that stock or its options. For a macro event, Nifty and Bank Nifty give you the cleanest, most liquid exposure with tight spreads.

Three Practical Ways to Position Around an Event

There is no single correct strategy, but three approaches cover most situations. Pick one deliberately and know its weakness before the event lands.

• Wait and trade the reaction. Do nothing before the news. After the release, let the opening range form, then trade the break with a stop. Weakness: you give up the initial gap, but you avoid IV crush and the initial whipsaw. This is the safest for beginners.
• Pre position with defined risk. Take a small directional view before the event using a debit spread so your maximum loss is the net premium paid. Weakness: you can be right on direction and still lose if the move is smaller than implied.
• Sell volatility with strict risk. Experienced traders may sell inflated premium expecting IV crush, often as a spread, never as a naked short. Weakness: a move larger than the market implied can cause an outsized loss, so this needs strict position sizing and is not for beginners.

Whichever you choose, write down your entry, your stop and your target before the event. Event candles move fast, and a plan written under calm conditions is worth far more than a decision made in the heat of a 4 percent gap.

The Tax and Cost Reality of Event Trades in India

Your screen profit is not your real profit. Two layers eat into it: trading costs and tax. On the cost side, every options trade carries brokerage, Securities Transaction Tax on the sell side, GST on brokerage and transaction charges, exchange transaction charges, SEBI turnover fees and stamp duty on the buy side. On a single lot these are small, but across many event day round trips they add up and must be netted from gross profit before you judge a strategy.

On the tax side, the rule that surprises most new traders is this. Intraday equity and all F&O trading is treated as business income, not capital gains. It is added to your total income and taxed at your applicable slab rate, whatever that is for you. The flat 20 percent short term capital gains rate and the 12.5 percent long term rate above 1.25 lakh apply to delivery based equity, not to your Nifty or Infosys options trades. So an F&O event trade does not get the 20 percent STCG rate at all. Because it is business income, you can usually set off trading losses and claim genuine trading expenses, but you should confirm your own position with a qualified chartered accountant.

Insider Trading and SEBI Rules You Cannot Ignore

There is a hard line between trading public information fast and trading information that is not yet public. The first is legal and skilful. The second is a crime. SEBI prohibits trading on unpublished price sensitive information, for example knowing a result, a buyback, a merger or a regulatory action before it is announced to the exchanges. If a friend at a company tips you about results before they are public, acting on that tip is insider trading and carries heavy penalties and possible prosecution.

Practically, this means your edge must come from speed of analysis and discipline, not from privileged access. Read the result after it is filed with the exchange, compare it to expectations, and react. Also beware of pump and dump messages on social media and unsolicited stock tips, which are often manipulation that SEBI actively prosecutes. Always verify news on the exchange filing or a credible source before you act, and never trade a rumour as if it were confirmed fact.

An Event Day Checklist and Common Mistakes

Most event day losses come from a handful of repeated errors. Run this checklist before and during the event so you do not become the liquidity for someone else's exit.

• Know the exact date and time of the event and whether it lands before, during or after market hours.
• Check expiry. Is it expiry week or expiry day. If so, expect faster decay and bigger swings.
• Decide your strategy in advance: wait and react, defined risk spread, or stand aside.
• Size the position so a full stop loss is a small, survivable fraction of your capital.
• Write entry, stop and target on paper before the candle prints.
• After the event, net out all charges and remember the tax is at slab, not 20 percent.

• Mistake: buying inflated options minutes before the result, then losing to IV crush even when right on direction.
• Mistake: chasing the very first print of a 4 percent gap, like Infosys on 19 April 2024, and getting caught in the fade.
• Mistake: trading with no stop because the move feels obvious. Event reversals are fast and brutal.
• Mistake: acting on an unverified social media rumour or a private tip, which is risky and can be illegal.
• Mistake: judging a trade on the screen profit and ignoring brokerage, STT, GST and slab tax.

Sources and Further Reading

For authoritative data and current rules, refer to SEBI, the Reserve Bank of India and NSE India. Always confirm current lot sizes, charges, STT rates and contract specifications on the official source and your broker contract note before you trade. The dated Infosys example is used for education only and is not a recommendation.

Sources and Further Reading

For authoritative data and further reading on this topic, refer to SEBI (Securities and Exchange Board of India), Reserve Bank of India and NSE India. Always confirm current rules, rates and contract specifications on the official source before you trade.