Options income
Put-write strategies
The cash-secured put run as a repeating programme, usually on a broad index rather than a single stock, with the collateral parked in Treasury bills.
How the position is built
The steps below are the order the trade is actually placed in, and the order matters: what has to be in the account before an option can be sold is what makes the obligation coverable. None of the steps mentions a price, because there is no options-chain feed behind this site — nothing on this page is a quote, and no premium named anywhere here is one that exists in the market today.
- Pick a broad-based index option rather than a single name, so the position cannot be wrecked by one company's news.
- Sell a put — commonly at or slightly below the current index level — and hold the full notional in cash or Treasury bills as collateral.
- Collect the premium up front and the interest on the collateral over the cycle. Both are part of the return.
- At expiration the option settles in cash: nothing if the index is above the strike, a cash debit if it is below.
- Write the next put and repeat. The programme is mechanical by design — the discipline is the strategy.
- Published rules-based versions of this exist as index methodologies and as funds, so the approach can be bought rather than run by hand.
The structural facts
Every line below is a rule of how the contract works, not a forecast and not a price. None of it moves when the market moves.
- What pays you
- Option premium plus interest earned on the Treasury-bill collateral. Those are two genuinely different kinds of income sitting in one number, and only the second one is interest.
- Best case
- The premiums collected plus the collateral interest. The strategy never owns the index, so it never participates in an index rally beyond the premium it was paid.
- Worst case
- The index falling to zero, less the premiums collected — the collateral is what absorbs it. Losses in a fast decline arrive far faster than premiums can rebuild them.
- Breakeven
- Per cycle: strike minus premium. Cumulatively: premiums and collateral interest collected, against the index's decline.
- Capital required
- The full notional of the index contract in cash or bills per contract. Index contracts are large, so this is the least accessible of the do-it-yourself strategies for a small account.
- Broker approval
- Index option writing; higher approval level and a margin agreement at most brokers.
- Assignment
- Broad-based index options are usually European-style and cash-settled: no early assignment and no shares delivered, just a cash settlement at expiration. That removes the assignment surprise but also removes the option of taking delivery and waiting.
Why tax gets its own box here rather than a line at the end. Premium is not taxed the way a dividend is, the treatment can change depending on whether the contract expires, is bought back or is assigned, and being assigned turns an option trade into a share sale or a share purchase with its own consequences. The note below is the general US structure, not advice, and not a substitute for asking someone about your own return.
When it hurts
This is the half of the trade that arrives later. The premium is collected once, at the start, and it is the whole of what this position can pay. The obligation behind it runs for the entire life of the contract, and the list below is what that obligation costs when the market moves through it rather than around it.
- A gap down between one close and the next: the loss is set by where the index settles, not by anything you can react to during the gap.
- A long bull market. The programme collects premium and watches the index leave without it, cycle after cycle.
- Sequence risk. A single bad settlement can undo many quiet months, and the strategy has no mechanism to earn that back faster.
- Cash settlement realises the loss as cash. There are no shares to hold and wait on afterwards.
- Contract size makes position sizing coarse — the smallest sensible position may be larger than the account should carry.
Full explainer in the Learn library: Put-write strategies. Run your own numbers with the covered-call yield calculator.
Questions about put-write strategies
How is a put-write programme different from selling one cash-secured put?
Why does the collateral matter so much?
Are index options really immune to early assignment?
Can I buy this rather than run it?
What does fully collateralised mean here?
The other option-income strategies
Covered calls
Call premium · capped at the strike
Read →Cash-secured puts
Put premium + interest on the collateral · the premium only
Read →Collar strategies
Net premium (call sold minus put bought) · capped at the call strike
Read →Credit spreads
Net credit between two option legs · the credit only
Read →Iron condors
Two credits, one on each side · the combined credit only
Read →Covered-call funds
Fund distribution (premium, dividends, gains, capital) · capped by the calls written inside the fund
Read →Where these trades get placed
The education arm funded by the US options exchanges and OCC, with free courses and calculators covering covered calls, cash-secured puts, assignment and exercise.
Free; run by the exchanges and the clearing house rather than a broker
Visit The Options Industry Council ↗The clearing house that stands as counterparty to every listed US equity and index option and publishes the assignment, exercise and adjustment rules.
Publishes 'Characteristics and Risks of Standardized Options', the disclosure document brokers must supply
Visit Options Clearing Corporation ↗Operates options exchanges where much US index and equity option volume trades, and publishes the methodology for its buy-write and put-write benchmark indices.
Index methodology and historical index values are published free
Visit Cboe Global Markets ↗A US brokerage built around options order entry, with per-contract pricing and position-level risk and probability displays.
Visit tastytrade ↗Brokers differ in option approval levels, assignment notification and what they pay on collateral cash. Verify with the broker before relying on anything here.