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What is Implied Volatility?

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Used in a sentence

The Daily Ledger · Markets

Option premiums ballooned as implied volatility spiked to a 52-week high before the drug trial readout.

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Overview

Implied volatility is the size of the price swings the market expects from a stock, worked backwards out of what its options cost. High IV means traders are paying up for protection or lottery tickets; it says how big the move might be, not which direction.
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Overview

Implied volatility is how big a move the market is bracing for, reverse-engineered from option prices. Big IV, expensive options, drama expected. It measures the size of the storm, not the direction. 😎

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Detail

IV is quoted as an annualized percentage: an IV of 30 means the options market is pricing in roughly a 30% up-or-down range for the stock over a year. It is not measured from the stock's past moves; it is worked backwards from what traders are currently paying for its options, so it captures what the market expects next. Before a big event like earnings, options cost extra, because everyone expects a big move and sellers charge for that risk. The moment the news lands, the uncertainty is gone, and that extra charge drains straight back out of the option's price, a drop traders call IV crush. This is how you can buy a call before earnings, watch the stock rise, and still lose money: the stock's climb was smaller than the extra you paid for expected drama. The higher the IV, the more you pay for the same option, and the bigger the move you need just to break even.
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Detail

It reads like an annual percentage: IV 30 means the market is pricing about a 30% swing range for the year. Nobody measured that from history; it is reverse-engineered from what traders are paying for options right now, live expectations with a price tag. Before every scheduled drama, earnings, trial results, Fed day, options get expensive, because sellers charge extra while everyone is bracing for fireworks. The second the news drops, the bracing is over and that extra charge drains out of the price instantly: IV crush. Classic rookie funeral: buy calls before earnings, the stock goes UP, you still lose, because the climb was smaller than the drama surcharge you paid. Bigger IV, bigger surcharge, bigger move needed just to get your money back. 😎

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Analogy

Hurricane insurance in June. When forecasters predict a violent season, premiums rise along the whole coast before a single cloud forms, because the price reflects the expected storm, not the weather outside. If the season passes quietly, premiums deflate, and everyone who bought at the peak paid for wind that never came.
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Analogy

Booking an Uber in advance for the minute the game ends. The reservation price already has the postgame rush built into it, that is the implied part. Overtime thriller and the whole stadium pours out at once: your locked price was a steal. Blowout, everyone left early, streets calm: you paid rush prices for a rush that never came, because the price was set on the expected crowd, not the real one.
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AI explanations may contain errors · Not professional advice

Formal definition — The same term, explained the usual way

Implied volatility is the volatility parameter that, when input into an option pricing model such as Black-Scholes, yields the option's observed market price. Expressed as an annualized standard deviation, it reflects the market's consensus forecast of the underlying's future price variability and typically exhibits mean reversion and event-driven term structure.

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