Cash Secured Put vs Credit Spread
Cash secured puts sell a downside option backed by enough cash to buy the shares, so assignment means ownership. Put credit spreads sell the same option and buy a lower one, capping the loss and requiring far less capital instead.
Both express the same view: price will not fall below a level. What differs is what backs the promise and what you are left holding if it does.
What each one is
A cash secured put sells a downside option backed by cash. If assigned you buy the shares at the strike, which is why the cash is set aside. Cash secured put covers it.
A put credit spread sells the same option and buys a lower one. The long put caps the loss and the capital requirement is the width rather than the whole purchase price. Credit spread covers it.
The short leg is identical. Everything that differs comes from what sits underneath it.
Where they differ
What happens on assignment. You own the shares, or you settle a difference. One outcome starts a position and the other closes a file.
Where the loss stops. The spread’s worst case is the width less the credit. The cash secured put’s worst case is the shares falling a long way while you hold them.
How much capital is committed. Enough to buy the shares, against the width of the spread. That is often an order of magnitude apart for the same short strike.
How much premium you keep. The long put costs money, so the spread collects less. That reduction is exactly what the cap is worth.
Where they agree
The view is identical. Both are saying price will stay above a level by a date, and both collect for saying it.
Both are assigned in the bad case. Neither resolves the way people picture when they set it up, which is quietly and above the strike.
Both charge costs at both ends — about 2% of the median bar range of 0.493 on this site’s shared series per round trip, and the spread pays that on two legs.
And both are priced from expected movement. A large credit means the market expects a large fall, which is information rather than a gift.
Which one to use
Sell the cash secured put when you want the shares. Being paid to wait at a price you were happy to buy at is the cleanest version of this trade, and assignment is the point rather than the risk.
Sell the spread when you want the view without the ownership. It expresses the same opinion, caps the damage, and does not leave you holding an instrument you did not want.
Sell the spread when capital is the constraint. Setting aside the full purchase price for every put limits how many positions you can hold at all.
And when the argument for the cash secured put is that it collects more, remember what for. The extra credit is payment for the uncapped fall the spread has protected against.
Why the ending is the real question
Because one leaves you invested and the other leaves you flat. If you would not want the shares at that price, the cash secured put has the wrong ending built into it.
And because the ending arrives on the bad day. Assignment happens when the shares have fallen, which is the condition under which you least want a large new position.
What to work out before either
Whether you want the shares at the strike. That single answer usually settles which structure is appropriate.
The maximum loss in currency. The width less the credit, or the shares falling to whatever they reach. Write both figures down.
What early exit costs. One leg or two, each charging its own spread, in a market that has just moved against you.
And how the premium compares to your ongoing costs. On this site’s arithmetic a 75-basis-point annual drag removes 20.2% of a thirty-year pot.
The original data
Of the 24,971 unique videos in research/search-study-corpus.jsonl, no title compares these two
directly — this pair is constructed from two subjects the corpus covers separately. Separately, cash
secured puts appear in 8 titles at a median of 30,048 across 7 channels, and credit spreads in 8 at a
median of 14,227 across 7. The counts come from site/corpus_count.py.
8 videos each, at medians of 30,048 and 14,227. Identical and very thin coverage, with double the audience per video for the cash-backed version — both are niche subjects and one of them is watched twice as much when it is made.
The answer to the question on that chart is the spread. A cash secured put on shares you do not want ends by handing them to you — which is the outcome you were trying to avoid, delivered on the worst possible day.
When it fails
The failure is selling cash secured puts on shares you do not want, chosen because the premium was large. A large premium means the market expects a large fall. The fall arrives, assignment happens, and you own a position you never wanted at a price above the current one, having been paid a fraction of the difference. On this site’s shared series 95% of bars sat below a prior peak, so waiting for a recovery is an ordinary thing to be doing and not a short one.
The second failure is sizing a spread from the credit. The width is the risk.
A third is ignoring how much cash a put ties up. It limits everything else.
A fourth is chasing the largest premium. It marks the largest expected move.
A fifth is treating premium as income. It is payment for an obligation.
And a sixth is expecting the quiet ending. Assignment arrives on the loud one.
Related
Cash secured put covers the cash-backed version. Credit spread covers the capped one. And assignment covers what happens when the short leg is exercised.
The question is what you want when it goes wrong. One hands you shares at a price you agreed to; the other hands you a loss and closes the file. Neither is better in the abstract — they are different endings to the same view.
— Michael Whitman
This page is educational, not financial advice. Test every idea on your own charts before risking money.