A cash-secured put is a promise, and you get paid to make it. You agree to buy 100 shares of a stock at a price you choose, by a date you choose, and you set aside the full purchase price in cash. The buyer of that put pays you a premium today for the right to sell you those shares if the stock falls below your price.

That is the entire mechanism. If you want the ground floor, including how assignment works and how to read the order ticket, my complete guide to cash-secured puts walks through it step by step. This article is about a narrower question, the one retirees actually ask me: can a put-selling program be trusted to produce income from a retirement account, and what should you honestly expect from it?

The answer is yes, with conditions. The conditions are the whole article.

Start with a single trade, because every claim later in this piece rests on arithmetic you can check.

Take a hypothetical blue-chip stock trading at $150. Its at-the-money options carry 25 percent implied volatility. You sell the 140 put expiring in 35 days. Because downside puts usually carry a little more implied volatility than at-the-money options, a pattern traders call skew, I priced that strike at 27.5 percent. The Black-Scholes model puts its fair value near $1.34, so assume a fill at $1.35.

Here is what that trade looks like:

The put carries a 0.18 delta, and the model gives it roughly a 21 percent chance of finishing in the money. You collect $135. You set aside $14,000 in cash to buy the shares if assigned. Your breakeven is $138.65, which is the strike minus the premium. That is 7.6 percent below today's price.

If the stock stays above $140 through expiration, you keep the $135, a return of 0.96 percent on the cash you set aside for 35 days. If it closes below $140, you buy 100 shares at $140, and your effective cost is $138.65.

Notice what I did not write: "both outcomes are profitable." The old version of this article said something close to that. It is not true. If the stock falls to $120, you still buy it at $140, and no amount of premium makes that a win. I will come back to that math, because it is the part that matters most to anyone living off a portfolio.

The best evidence on systematic put selling comes from a 2019 study by Professor Oleg Bondarenko, written for Cboe. He examined the Cboe S&P 500 PutWrite Index, known by its ticker PUT, which sells one-month, at-the-money S&P 500 puts every month and holds enough cash to cover them.

The previous version of this article claimed the index beat the S&P 500, 10.1 percent a year versus 9.9 percent, with volatility of 12.2 percent versus 15.8 percent. That was wrong. According to the study itself, from June 1986 through December 2018 the PUT index returned 9.54 percent a year compounded, slightly behind the S&P 500's 9.80 percent. Its standard deviation was 9.95 percent, against 14.93 percent for the index.

I want to be precise about why the corrected numbers are the better argument, not the worse one. A put-selling program did not beat the stock market over three decades. It came within about a quarter of a point of the market's return while taking roughly a third less volatility. The study also measured drawdowns from 2006 through 2018: the worst peak-to-trough loss was 32.7 percent for PUT, compared with 50.9 percent for the S&P 500.

For someone drawing income, that trade is valuable. A smaller drawdown is not a statistic. It is the difference between trimming your withdrawals in a bad year and selling assets at the bottom to pay the bills.

I also removed several other claims from the old version, including a figure about how often puts expire worthless and a statistic on early assignment rates. I could not find a source for either. If a number cannot be traced, it does not belong in front of people making retirement decisions.

Why would selling insurance on stocks work at all? Because people who buy protection tend to pay more for it than the damage turns out to cost.

Bondarenko measured this directly. From 1990 through 2018, the average implied volatility of the S&P 500, as measured by the VIX, was 19.3 percent. The volatility that actually occurred averaged 15.1 percent. Option buyers, on average, paid for 4.2 points more movement than they got. That gap is the volatility risk premium, and it is the seller's real edge.

That is also why the edge is not the same thing as a high win rate. A put far below the market wins more often and pays less, and at the market's own price that trade is roughly fair. The seller earns something extra only when realized volatility comes in below what was priced.

Strike selection follows from this. House rules for cash-secured puts call for a delta between 0.15 and 0.30, and for placing the strike at or beyond the one standard deviation expected move. In our example, the expected move over 35 days is $150 times 25 percent times the square root of 35 over 365, or about $11.61. The lower boundary sits at $138.39. The 140 strike is $1.61 inside it. The 137.50 strike is outside it, but it pays about $0.94 at a 0.14 delta, just below the band.

These two rules pull in slightly different directions, so here is how I reconcile them. For a retirement account, the expected move boundary is the default, which in practice means the conservative end of the delta band, roughly 0.15 to 0.20. Move toward 0.25 or 0.30 only on a stock you actively want to own at that price. The 140 strike is a deliberate choice at 0.18 delta, and it accepts a slightly higher chance of assignment for more than 40 percent more premium. For more on choosing within that range, see the delta sweet spot framework.

The old version of this article described a retiree selling puts on stocks priced at $115, $150, and $200 inside a $50,000 allocation, while also telling readers never to commit more than 5 percent of a portfolio to one position. Those instructions cannot both be followed. A single contract on a $200 strike ties up $20,000.

Here is sizing that follows the rules. Take a $500,000 retirement account. The house standard is 2 to 3 percent of the account per position, with 5 percent as a hard ceiling, not a target. One contract of our 140 put commits $14,000, which is 2.8 percent. Eight positions like it, spread across different sectors, commit $112,000, or 22.4 percent of the account.

One more reconciliation. House guidance also keeps total options exposure between 10 and 20 percent of an account, and 22.4 percent is above that. The difference is what the money is doing. That guideline caps capital at risk in leveraged or defined-risk options positions. Cash-secured collateral is fully funded stock exposure, one assignment away from being shares. Count it against your stock allocation, not your options budget. If your plan says 50 percent in stocks, collateral for puts is part of that 50 percent.

This is the section retirees should read twice.

At expiration, if the stock rises 10 percent, you keep $135 while a shareholder makes $1,500. If it falls 5 percent to $142.50, you keep $135 while the shareholder loses $750. At a 10 percent drop, you lose $365 and the shareholder loses $1,500. At 20 percent, you lose $1,865 against $3,000. At 30 percent, you lose $3,365 against $4,500. From your $138.65 cost basis, that last case is a 24.3 percent loss.

The put gives you a head start of the strike distance plus the premium. Past that point, you own the decline almost dollar for dollar. What to do next matters more than what already happened, and my guide to managing a losing cash-secured put covers it in detail. The short rule: never sell more puts on the same falling name to average down. That is how a 2.8 percent position quietly becomes a 10 percent one.

One correction on early assignment, which the old version got backwards. Dividends are a reason calls get exercised early, not puts. A dividend actually encourages a put holder to wait, because the stock drops by the dividend amount on the ex-dividend date. Early assignment on a short put usually happens when the put is deep in the money and has almost no time value left. Either way, your cash is already set aside, so an early assignment changes the timing of the purchase, not the risk.

The old version promised a retiree 19.7 percent a year. Delete that number from your memory.

In our example, each cycle earns 0.96 percent of the collateral. Annualized, that is about 10 percent, but only if every single cycle expires worthless, which it will not. Premium is gross income. Your return is what remains after the losing cycles.

The study shows the size of that gap. From 2006 through 2018, the PUT index collected an average of 22.1 percent a year in gross premium selling at-the-money puts. Over its full history, its compound return was 9.54 percent. Those figures cover different periods, so do not subtract one from the other, but the lesson is plain: gross premium runs far ahead of what a put seller actually keeps. Our 0.18 delta puts collect much less than at-the-money puts, in exchange for fewer and smaller assignments.

For a retiree, the realistic promise is modest: income that may compete with a stock portfolio's long-run return, with a smoother path and deeper cushions in moderate declines. That is a good deal. It is not a secret, and it is not 20 percent.

Sell puts only on businesses you would be glad to own at the strike, with liquid options and no earnings report before expiration. Use 30 to 45 days to expiration. Keep the delta between 0.15 and 0.30, defaulting to the expected move boundary. Size each position at 2 to 3 percent of the account, never above 5. Close winners once you have captured 50 to 75 percent of the premium rather than waiting out the last few dollars. When assigned, sell covered calls against the shares instead of panic selling, which is the second half of the wheel strategy.

On taxes: in a taxable account, premium from a put that expires worthless is a short-term capital gain. If you are assigned, the premium reduces your cost basis in the shares instead. In an IRA, neither event is taxed when it happens, which is one reason many retirees run this strategy there. Ask a tax professional about your own situation.

If you want these rules applied in real time, with every trade, every assignment, and every loss reported, that is what we do in The Income Foundation. You can join here.

Cash-secured puts can earn a place in a retirement account. The research supports equity-like returns with meaningfully less volatility and smaller drawdowns. It does not support outsized income, and it does not support the idea that selling puts is safe. You are buying stocks on a delay, getting paid to wait, and accepting the downside the moment the stock falls through your strike.

Sell conservatively. Size smaller than feels necessary. Expect less than the brochures promise. The traders who last are the ones whose plan survives the bad year.

Probabilities over predictions,

Andy Crowder

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