CSP vs naked put
Last updated: May 30, 2026 · Cash-Secured Puts series
A cash-secured put and a naked put are mechanically the same trade — you sell a put. The only difference is whether you're holding cash equal to your maximum obligation. The CSP holds the cash; the naked put doesn't.
That sounds like a trivial distinction. It matters more than you'd think. CSPs are Level 3 options approval at most brokers; naked puts are Level 4. CSPs can be run in IRAs; naked puts can't. And the buying power requirement is dramatically different.
Same economics, different collateral
Identical setup:
SPY at $400. You sell a $390 put expiring in 30 days for $3 premium ($300).
If you have $39,000 in cash set aside, it's a CSP. If you don't (and rely on margin), it's a naked put.
Either way:
- Premium received: $300
- Max gain: $300
- Max loss: $38,700 (if SPY goes to zero)
The economic outcomes are identical. The difference is what's holding up the position as collateral.
Buying power comparison
CSP buying power: $39,000 cash + the trade reduces buying power by exactly the cash set aside. You can't use the same dollars elsewhere.
Naked put buying power: typically 20% of the underlying value + the premium received, minus any OTM amount. For our SPY example: roughly $7,500-9,000 of buying power per contract. Far less capital intensive.
That looks like a massive efficiency win for naked puts. It isn't, for two reasons:
- Buying power scales as the position goes against you. If SPY drops to $370, the buying power requirement jumps to compensate. You can get margin-called at the worst possible moment.
- Assignment requires cash anyway. If you're assigned, you have to come up with $39,000. If you don't have it in cash, you're force-borrowed on margin, paying interest, possibly triggering a margin call.
Account type implications
The CSP/naked distinction matters for which accounts you can use:
- Cash accounts: CSPs only. No margin = no naked positions.
- Margin accounts (taxable): Both CSPs and naked puts allowed at the right approval level.
- IRAs (Roth and traditional): CSPs only. Naked options of any kind are not permitted in IRAs.
For most retail income sellers, the IRA restriction is the binding constraint. If you want to do options income in a tax-advantaged account, you're running CSPs (not naked puts) whether you like it or not.
When the difference actually matters
For day-to-day trading, the CSP/naked distinction is mostly invisible. You pick a strike, you sell, you wait for expiration. The premium is the same; the assignment outcome is the same.
Where the distinction bites:
During volatility spikes. Naked put margin requirements expand. If you're running 10 naked puts and VIX jumps from 15 to 30, your buying power requirement might double overnight — possibly triggering a margin call that forces you to close at the worst moment.
If the underlying gaps down dramatically. CSPs are emotionally easier to ride out because the cash is already committed. Naked puts feel like watching a tightrope walker.
For position sizing discipline. CSPs naturally cap your exposure because you can only sell as many as you have cash for. Naked puts let you over-extend, which is how accounts blow up.
My recommendation
For retail income sellers, default to CSPs. The capital efficiency “advantage” of naked puts is mostly an illusion — you're using buying power that scales against you, you can get margin-called, and assignment requires the cash anyway.
The legitimate case for naked puts: experienced traders running large books who actively manage delta exposure and have the capital cushion to absorb a 2-3 standard deviation move in their underlyings. For everyone else, CSPs.
FAQ
Can I run naked puts in an IRA?
No. All naked options strategies are prohibited in IRAs. CSPs are allowed because the cash backing the put eliminates the “naked” classification.
Do naked puts have higher returns than CSPs?
Both produce identical premium income per contract. The naked put has higher returns as a percentage of capital tied up — but that capital tied up is misleading because buying power can expand if the trade goes against you.
Which is riskier, CSP or naked put?
Identical economic risk per contract. The naked put has additional management risk from margin-call dynamics. The CSP is more conservative because the cash is committed up front.
Can I convert a CSP to a naked put?
Yes — withdraw the cash backing it. Your broker will switch the position's classification to naked and recalculate buying power. Some brokers don't allow this if your account is below the Level 4 approval threshold.
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