Selling cash-secured puts on MSFT

Selling a put transfers the downside between $495 and zero to you, and you are paid $10.90 per share for taking it. "Cash-secured" simply means you hold the $49,500 required to buy the shares instead of leaning on margin. Same position, honest denominator.

At October 30, 2026: above $495 the put expires worthless and you keep $1,090 — that is the maximum this trade can make, $1,090. Below it you're assigned 100 shares at $495, with an effective cost basis of $484.1 once the credit is applied. That is 6.2% below where MSFT trades today.

The engine puts the probability of keeping the full credit at 73% on MSFT at $516.17 with 33% ATM implied vol on the Oct 30 expiry. High win rate, capped payoff, uncapped-to-zero loss — the risk profile of every short-premium trade. It is not free money; it is a rent cheque for underwriting someone else's insurance.

Max loss is $48,410 — the strike, less the credit, times 100, if MSFT goes to zero. That number is not theoretical on single names; it is simply unlikely. Size the position against that figure, not against the premium.

Assignment is not the loss — being assigned at $495 when MSFT is at $396 is. If you are running the wheel, that is the moment the plan is tested: you own shares at a basis of $484.1 and the market disagrees.

Liquidity is a risk, not a convenience. The moment you most want out of a short-premium position is the moment the spread is widest, and the exit price you modelled at mid will not be available.

Microsoft is what a premium seller's underlying is supposed to look like: implied vol that sits a couple of points above realized between prints, a share price high enough that one contract is a meaningful position, and a dividend small enough that early assignment is a calendar check rather than a constant threat. The yields are unglamorous. They are also the ones that survive a decade.

MSFT's Oct 30 strikes are $5 apart near the money (0.97% of spot). Enough rungs to express a view, few enough that each one moves the economics visibly. 50k contracts of open interest on Oct 30 is workable around the money and thin in the wings — width costs more here than the ladder suggests. 42 strikes on that expiry — 98% of the board — carry prints that agree with their own implied volatility and hold up across the ladder, and those are the strikes priced here. Tight at every listed strike; round-number strikes carry the open interest and the best fills.

The surface is close to flat: only 1.7% between the 25-delta put and the 25-delta call. A flat skew means the usual put-side pickup is not there, so the case for selling downside rather than upside on this name is weaker than the habit suggests. The term structure is flat inside 1.5% between the two captured expiries, so there is no calendar edge to harvest and no event visibly priced into one month over the other.

At 33% ATM implied vol, the Oct 30 options are pricing a one-standard-deviation move of $51.86 over 33 days — roughly −10.0% to +10.0%, or $464.31 to $568.03. Everything the cash-secured put above collects is rent on that range. If MSFT routinely covers 10.0% in 33 days, the credit is fair compensation rather than edge.

The specific way people lose money on MSFT: Assuming a quiet chart means quiet options. Microsoft's earnings gaps have repeatedly cleared the implied move while the between-print tape stayed asleep.