Options traders put real money on how much a stock will move, and sometimes on which way. That makes the options market one of the few places you can read the crowd's expectations directly. It's also easy to over-read. Here's what each common signal tells you, and what it doesn't.
Implied volatility: how much the market expects it to move
An option's price depends heavily on how much the stock is expected to swing before the option expires. Work backwards from the price and you get implied volatility (IV): the market's estimate of future movement, written as a yearly percentage.
High IV means traders expect big moves (often before earnings, a drug trial result or a court ruling). Low IV means they expect a quiet stretch.
The expected move: IV turned into a range
The most practical number options give you is the expected move: roughly how far the stock could move, up or down, by a given date. A quick way to estimate it is the price of the at-the-money straddle (buying both the call and the put at the strike nearest today's price) for that expiry.
If a $100 stock's straddle for next week costs $5, the market is pricing roughly a $5 move, or about 5%, either way. That isn't a forecast of direction. It's a sense of scale: a move of 2% would be ordinary, a move of 12% would be a genuine surprise.
This is the options market's most reliable contribution: it sizes moves better than it calls them.
The put/call ratio: who's buying protection
The put/call ratio compares how many puts (bets on, or protection against, a fall) trade against calls (bets on a rise).
- A high ratio can mean fear, or simply that big holders are buying insurance on shares they own.
- A low ratio can mean optimism, or speculation.
Because so much options trading is hedging, the ratio is noisy for a single stock. Some traders even read extremes as a contrarian sign. Treat it as a mild hint, not a signal.
Skew: which side is more expensive
Skew compares implied volatility on puts against calls at similar distances from the price. If downside puts are much more expensive than upside calls, traders are paying more to protect against a fall. Most stocks have some downside skew all the time, so what matters is a change: skew getting steeper or flatter than usual.
Unusual activity
Big, out-of-the-ordinary trades in a particular strike and date get a lot of attention online. Some are informed bets. Many are hedges, spreads that look different in isolation, or one fund rolling a position. Without knowing who traded and why, unusual activity is a lead to investigate, not a conclusion.
Pitfalls
- Quotes near expiry and far from the price can be junk. Thinly traded strikes and options with a day or two left often show nonsense implied volatilities. Use options a week or more out, near today's price.
- After hours, data can go stale. Some data feeds show broken implied volatilities overnight or at weekends.
- Earnings inflate IV, then it collapses. Expected moves before a report are bigger than usual, and IV usually drops sharply afterwards.
How Ticker Council uses the options market
The Options Market seat on Ticker Council reads the stock's option chain: strikes, expiries, implied volatility and the put/call ratio. Its main job is the expected move, which the rest of the Council's price ranges are checked against. It may lean up or down from skew and the put/call ratio, but it's told to be cautious about direction and to say so. It ignores expiries under five days and strikes far from the price, and works implied volatility out from option prices itself when the data feed's numbers are broken.
Not financial advice: this guide explains how to read options data, not what to buy, sell or trade.
Questions
What does implied volatility tell you about a stock?
How much the options market expects the stock to move before a given date. High implied volatility means traders expect larger swings, often around events like earnings.
How do you calculate a stock's expected move from options?
A quick estimate is the price of the at-the-money straddle (the call plus the put at the strike nearest the current price) for the expiry you care about. Divide by the stock price to get the expected move as a percentage, either way.
Is a high put/call ratio bearish?
Not necessarily. Many puts are bought as insurance by people who own the stock, so a high ratio can reflect hedging rather than a bet on a fall. For a single stock it's a noisy signal.