Calls and puts are the two basic options types. This is the lazy-friendly version: what each one is, why calls are usually bullish and puts are usually bearish (but not always), and how to read them in flow alerts.
A call option is the right (not the obligation) to buy a stock at a set price by a set date.
What is a put option?
A put option is the right (not the obligation) to sell a stock at a set price by a set date.
Why calls can be bullish
When somebody buys a call on the ask (paying up) and the contract has high vol/OI (fresh positioning), it usually means the buyer expects the underlying to rise meaningfully before expiration.
The bigger and more urgent the call buying, the more conviction the buyer is showing.
Why puts can be bearish — or hedging
Put buying is more ambiguous than call buying:
Pure bearish bet — buyer thinks the stock will fall.
Hedge — buyer owns the stock and is buying puts as insurance.
This is why looking only at “put volume” without context can be misleading. The Lazy Trader AI classifier flags hedges by checking for matching long-stock activity.
Why context matters
Calls and puts are tools, not signals. The signal is in how they were traded — ask vs. bid, sweep vs. block, hedged vs. naked, vol/OI ratio, and timing relative to upcoming catalysts.
How options flow apps label calls and puts
Inside Lazy Trader AI, every flow alert ships with:
The contract type (call or put).
Strike price and expiration.
Side (ask or bid).
Premium total in dollars.
Vol/OI ratio.
Whether matching stock activity is offsetting it.
An AI summary that translates all of that into one sentence.
A call is the right to buy a stock at a set price; a put is the right to sell. Buying a call is generally bullish; buying a put is generally bearish — but puts are also frequently used as hedges, which makes the direction more nuanced.
No. A put bought against an existing long-stock position is a hedge, not a bearish bet. A call sold (rather than bought) is typically a neutral-to-bearish stance. Direction depends on the action, not the contract type.
When buying calls or puts, the maximum loss is the premium you paid. When selling them — especially uncovered — losses can be much larger or unlimited. This is one reason buying is more common for retail.
Every alert ships with the contract type, strike, expiration, side (ask/bid), premium, vol/OI ratio, and an AI sentiment tag (bullish, bearish, neutral, or hedge).
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