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Synthetic long stock vs buying the shares: is it really cheaper?

A synthetic long, a bought call plus a sold put at the same strike, moves almost exactly like 100 shares. Pick it only if you want stock-like exposure without spending the cash and can handle margin calls. On a big drop, it loses about the same as owning the shares.

Comparison · 7-minute read · Updated 2026-11-09

The short answer

Buying 100 shares and holding a Synthetic long give you almost the same gains and losses. The difference is how you pay for it and what you give up.

• Buying the shares costs the full price up front. You get dividends. You can hold forever.
• A synthetic long buys a call and sells a put at the same strike and expiry. It costs little up front, but a broker holds margin against the sold put. You get no dividends, and it ends on expiry day.

If you'd have the full cash set aside anyway, buy the shares. Pick the synthetic only if you want the exposure with less cash and you can meet a margin call. It is not a cheaper way to take the risk. It is the same risk, paid for differently.

Side by side

The short put is the part you already know

If you sell cash-secured puts, you already own half of a synthetic long. A sold put loses dollar for dollar below its strike, just like shares. The bought call adds the upside the put gave away.

So here's the question wheel sellers ask: "If I keep the full strike in cash behind the put, is it still cheaper?" No. Then the synthetic ties up the same cash as buying the shares. It's a cash-secured put with a call bolted on. The only way it saves cash is by using margin, and margin is where the danger lives.

One stock, both ways (hypothetical)

Redwood Outfitters, a made-up stock, trades at $80. It pays a hypothetical $0.40 dividend each quarter.

Buy the shares. 100 shares × $80 = $8,000 out of your account.

The synthetic, 90 days out. Buy the $80 call for $4.95. Sell the $80 put for $4.55. Net debit: $0.40, so $40. Under the standard margin formula for an uncovered put, the broker holds about 20% of the stock price plus the put's premium: $16.00 + $4.55 = $20.55 a share, so about $2,055. Brokers can ask for more. The naked put margin calculator runs that formula on your numbers.

A dividend is paid during the 90 days. The shareholder gets $40. The synthetic gets nothing.

Look at the top row. A 30% drop costs the shareholder $2,360 and the synthetic $2,440. Almost the same. The synthetic didn't cap your loss because you put less money in. The sold put carried the whole fall.

And the margin hold grows on the way down. Near $56, the put is about $24 in the money. The standard formula then wants more than $3,500. That's the moment a margin call can force you to add cash or close at the low.

Why the synthetic is $80 behind on every row

Two reasons, $40 each: the debit you paid and the dividend you missed. But you also kept $8,000 of cash you didn't spend. At a hypothetical 4% a year in a money-market fund, that earns about $80 in 90 days. The gap closes.

That is the real lesson. Option prices already include interest and dividends. The synthetic isn't cheaper. It's the same deal, priced fairly.

Which one fits you?

One sizing rule makes the synthetic honest: only open as many as you could afford to own outright. If you couldn't pay $8,000 for 100 Redwood shares, a synthetic on 100 shares is borrowed exposure. A 30% drop will hurt just as much.

To see the synthetic next to every other strategy, use the options strategy comparison chart. If the short-put half appeals to you on its own, that's the wheel strategy.

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