Selling cash-secured puts on IWM

Selling a put transfers the downside between $275 and zero to you, and you are paid $3.51 per share for taking it. "Cash-secured" simply means you hold the $27,500 required to buy the shares instead of leaning on margin. Same position, honest denominator.

At October 30, 2026: above $275 the put expires worthless and you keep $351 — that is the maximum this trade can make, $351. Below it you're assigned 100 shares at $275, with an effective cost basis of $271.49 once the credit is applied. That is 3.7% below where IWM trades today.

The engine puts the probability of keeping the full credit at 74% on IWM at $281.97 with 19% 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.

The real-world failure mode is a gap, and IWM has the catalysts for one: rate expectations, regional-bank headlines, and quarterly Russell rebalancing. A put sold 2.5% out of the money offers no protection at all against a move twice that size overnight.

Assignment is not the loss — being assigned at $275 when IWM is at $220 is. If you are running the wheel, that is the moment the plan is tested: you own shares at a basis of $271.49 and the market disagrees.

Early assignment is an operational risk rather than a market one: it arrives on a weekend, converts a defined structure into a stock position, and requires cash you may have allocated elsewhere.

The richest index premium on this list, and the one that most reliably pays for itself — small-cap implied vol has run a wider gap over realized than SPY's for years. The catch is trend: IWM does not chop, it goes, and a short strike that looked comfortable at 0.16 delta gets run over in a week when the rate narrative flips.

IWM's Oct 30 strikes are $2 apart near the money (0.71% of spot). Enough rungs to express a view, few enough that each one moves the economics visibly. 144k contracts of open interest on Oct 30 is deep enough that multi-leg orders fill near mid at retail size. 37 strikes on that expiry — 90% 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. Deep enough for four legs at retail size; the wings thin out faster than on SPY, so cap width at what the book supports.

Skew is ordinary — the 25-delta put implies 2.7% more vol than the 25-delta call, about what an equity surface looks like when nothing unusual is being priced. Neither side of the chain is being singled out, which is the condition under which a symmetric structure like a condor is actually symmetric. 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 19% ATM implied vol, the Oct 30 options are pricing a one-standard-deviation move of $16.24 over 33 days — roughly −5.8% to +5.8%, or $265.73 to $298.21. A short-premium structure here is a bet that 5.8% over 33 days is more than IWM will actually use. That is the thesis, stated honestly.

The mistake this name punishes hardest: Selling the wings because the index label implies mean reversion. IWM's realized distribution has fatter shoulders than SPY's at the same implied vol.