What Is a Cash-Secured Put?

A cash-secured put means agreeing to buy 100 shares at a strike price you choose — with the cash to do it already set aside before you place the trade.

How it works

When you sell (or "write") a put option, you're selling someone else the right to sell you 100 shares at an agreed price, called the strike. Pick a strike at or below today's price, on a stock you'd genuinely be willing to own. The moment you sell the put, you collect a premium — cash that's yours to keep no matter what happens next.

"Cash-secured" is the key word: your account holds enough cash to cover the full purchase (strike price × 100 × number of contracts) for as long as the position is open. Real cash, not margin or borrowed buying power.

A worked example

XYZ trades at $52. You sell one put contract, $50 strike, 30 days out, and collect $1.20 premium per share.


Premium collected (100 × $1.20)	$120
Cash reserved as collateral (100 × $50)	$5,000
If XYZ stays above $50 at expiration	Put expires worthless — you keep the $120
If XYZ falls below $50 at expiration	Assigned 100 shares at $50; effective cost $48.80/share after the premium

Either way, the $120 is yours. The only question is whether you end up with cash back in hand, or 100 shares at a price lower than the strike you agreed to.

Why traders use them

Two common reasons: collecting income on cash that would otherwise sit idle, or getting paid while waiting for a chance to buy a stock below today's price. If the stock never drops to your strike, you've earned a return on cash you were holding anyway. If it does, your real cost basis is lower than the strike, because the premium already came in.

Trade with discipline

Your cash is tied up as collateral for the whole life of the trade — it can't be used for anything else. And if the stock falls well below your strike, you're still obligated to buy at $50, even if the market is at $30 by expiration. The premium softens the loss; it doesn't cap it. Before you place a cash-secured put, know your strike, your expiration, and your maximum risk — and only sell puts on stock you'd genuinely be glad to own, not just whatever pays the biggest premium.

Key takeaway: A cash-secured put pays you a premium today in exchange for agreeing to buy a stock you'd actually want, at a price you actually choose.

Next: how the strike you pick changes both that premium and your odds of actually owning the stock.

This lesson is educational content explaining standard options mechanics, not personalized investment or trading advice.