Plain-English definitions for the wheel strategy and the multi-leg strategies built on top of it.
The wheel is a premium-selling strategy built around a repeating cycle: sell a cash-secured put on a stock you're willing to own; if it expires worthless, keep the premium and sell another; if it's assigned, you now own 100 shares per contract at the strike price. From there, sell covered calls against those shares; if they expire worthless, keep the premium and sell another; if the shares get called away, you're back to cash and the cycle restarts. The goal is to collect premium at every step, whether options expire worthless or get assigned/called away. See the full wheel strategy guide for a worked example.
A cash-secured put means selling (writing) a put option while holding enough cash to buy 100 shares per contract at the strike price if assigned. If the stock stays above the strike, the put expires worthless and you keep the premium. If it falls below the strike and you're assigned, you buy the shares at the strike price — effectively your worst-case entry price is reduced by the premium you already collected.
A covered call means selling (writing) a call option while owning at least 100 shares of the underlying stock per contract sold. If the call is assigned, you sell those shares at the strike price — which you can already deliver, since you own them (as opposed to a "naked" call, where you'd have to buy shares on the open market to deliver, a much riskier position). You keep the premium collected either way. It caps your upside above the strike price in exchange for that premium. See cash-secured puts vs. covered calls for a side-by-side comparison.
Assignment happens when the buyer of an option you sold exercises their right, obligating you to fulfill the contract. If you sold a put and it's assigned, you're required to buy 100 shares per contract at the strike price, regardless of the current market price. If you sold a call and it's assigned, you're required to sell 100 shares per contract at the strike price. Assignment is more likely the deeper an option is in the money as expiration approaches, but it can technically happen any time the option is in the money (American-style options, which most equity options are).
Rolling means buying back a short option to close it and, at the same time, selling a new option on the same underlying at a different strike and/or a later expiration. It's commonly used to give a covered call or cash-secured put more room or time — rolling a covered call up and out if the stock has rallied past the strike, or rolling a cash-secured put out (and sometimes down) if the stock has dropped below the strike. A roll can be done for a net credit (the new premium collected exceeds the cost to close) or a net debit (it costs more to close than the new premium collected); it doesn't erase a loss on the closed leg, it just trades that leg for a new one with different terms.
A vertical spread combines a long option and a short option of the same type (both calls or both puts) and the same expiration, but different strikes. It's "defined risk": both max loss and max gain are capped by the distance between the two strikes. A credit spread collects a net premium upfront (max gain = the credit; max loss = strike width minus the credit); a debit spread pays a net premium upfront (max loss = the debit paid; max gain = strike width minus the debit).
An iron condor combines two vertical credit spreads: a put spread below the current price and a call spread above it, same expiration. It profits if the stock stays between the two short strikes through expiration, collecting the combined credit from both spreads. Because only one side can be breached at expiration, max loss is the wider of the two spreads' strike widths minus the total credit collected from both — not each side's own credit added together.
A straddle is a call and a put at the same strike and expiration; a strangle is the same idea at different strikes (typically both out of the money). Buying either is a bet on a big price move in either direction — max loss is the total premium paid, max gain is effectively uncapped on the upside (and large, though not literally uncapped, on the downside). Selling either is a bet the stock stays relatively still — max gain is the premium collected, but max loss is uncapped on the upside, since there's no long call to cap it.
A calendar spread sells a near-term option and buys a longer-dated option at the same strike, same option type; a diagonal spread is the same idea at different strikes. The position profits from the near-term option's faster time decay relative to the longer-dated one. Unlike a vertical spread, max risk isn't simply the strike distance — it depends on the underlying's price and implied volatility when the near-term leg expires, since the longer-dated leg still has time value left at that point.
Implied volatility is derived from an option's market price: it's the volatility level that, plugged into an options pricing model, produces that price. It reflects what the market expects the underlying stock to do, not a guarantee. Higher IV means the market expects bigger price swings, which makes options (both calls and puts) more expensive — good news for sellers (bigger premiums), a real cost for buyers. IV tends to spike before known events (earnings, FDA decisions) and fall afterward, a pattern often called "IV crush."
Every option has some value tied purely to how much time is left until expiration (extrinsic/time value), separate from its intrinsic value (how far in the money it is, if at all). Theta measures how fast that time value decays, and it accelerates as expiration gets closer — most pronounced in the final 30-45 days. This is the core mechanic behind premium-selling strategies like the wheel: sellers collect that time value as it decays, while buyers of options are fighting against it.
For strategies with a fixed, calculable worst and best case (verticals, iron condors, straddles/strangles), max risk and max gain describe those bounds if the position is held to expiration. They assume no early assignment, no adjustments, and no closing the position early — actual results (from closing early, assignment, or exercising your own long leg) can differ. They're a planning tool for knowing your worst case going in, not a guarantee of the outcome.
OptionsLoop tracks every strategy on this page — the wheel, verticals, iron condors, straddles, and calendars — with automatic cost-basis linking and P&L.
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