What is Implied Volatility (IV)? A Simple Guide

Implied volatility (IV) is the market's expectation of how much an underlying will move in the future, worked out from option prices. It measures the size of expected moves, not the direction. Higher IV means bigger expected moves and more expensive options.

Implied volatility is one of the most important ideas in options, yet many beginners overlook it. It explains why two similar options can have very different prices.

IV drives whether options are cheap or expensive at any moment. We will cover the idea, an example, and the practical takeaways. You can track it on Stockk.

Key Takeaways

• IV is the market's expectation of future movement.
• It measures size of moves, not direction.
• Higher IV means more expensive options.
• IV often rises before events and falls after.
• High IV favours sellers; low IV can favour buyers.

How does IV affect option premiums?

IV is a direct input into option pricing, so rising IV inflates premiums and falling IV deflates them, even if the spot price does not move. This is why options can get expensive before big events and cheap during calm periods.

Suppose two NIFTY options have the same strike and expiry, but one trades when IV is 12% and another when IV is 20%. The higher-IV option costs much more, because the market is pricing in a larger expected move during its life.

Why does IV rise before events?

Before a known event such as results, a budget or an election outcome, no one is sure how the market will react. This uncertainty pushes IV up, which lifts option premiums. Once the event passes and the outcome is known, the uncertainty disappears and IV falls, often sharply.

How do traders use implied volatility?

• High IV: options expensive, often better to sell
• Low IV: options cheap, often better to buy
• Around events: expect IV to rise before and fall after

IV is about size, not direction

A common mistake is to think high IV means the market will go up or down. It does not. IV only tells you how big a move the market expects, not which way. This is why IV pairs naturally with directional tools: you use other analysis to decide direction, and IV to judge whether the options are cheap or dear for expressing that view.

Ready to put this into practice? Stockk lets you trade futures and options, with Indira Securities as your SEBI-registered broker. A demat account is free to open, and the Knowledge Center has more guides like this one.

Futures and Options are leveraged products and carry a high risk of loss that can be more than the money you put in. This article is only for learning and is not a recommendation to trade in derivatives.

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