Skip to main content

Backspread

You think vol is cheap and the market is about to move, hard, in one direction. But you don't want to pay for it. The backspread lets you get long vol with a directional bias, often at zero cost.

A backspread (also called a reverse ratio spread) is the opposite of a ratio spread. Sell 1 ATM option, buy 2 OTM options of the same type. You're net long options, which means you're long gamma, long vega, and paying theta for the privilege. The ATM sale finances most or all of the cost.

The catch: there's a danger zone between the strikes where the single short option is deep ITM but the two long options haven't caught up yet. You need the market to move through it, not camp in it.

💡

The backspread is the natural counter-trade to a ratio spread. If you think someone selling cheap OTM options for income is wrong about vol, the backspread is how you bet against them. You're buying the cheap wings they're selling.

What You Do (Call Backspread)​

The Setup
Sell1 ATM call at lower strike (K1)
Buy2 OTM calls at higher strike (K2)
Max Profit
Unlimited (upside)
Max Loss
At K2 (danger zone)
Cost
Zero or small credit
Vol View
Long vol, bullish bias

Worked Example​

BTC at 94,800. Sell 1 ATM 95k 30-day call for 4,250. Buy 2x 100k 30-day calls for 2,080 each.

Net credit: 4,250 - (2 x 2,080) = 90.

  • BTC at 94,800 at expiry: all calls expire worthless. You keep the 90 credit. Barely a trade, but you didn't pay anything.
  • BTC at 100,000 (danger zone): short call is 5,000 ITM. Long calls are ATM, worth nothing intrinsically. Loss: 5,000 - 90 credit = 4,910. This is max pain.
  • BTC at 110,000: short call is 15,000 ITM. Two long calls are each 10,000 ITM = 20,000 total. Profit: 20,000 - 15,000 + 90 = 5,090.
  • BTC at 120,000: short call 25,000 ITM. Two long calls 40,000 total. Profit: 15,090. The asymmetry accelerates.
  • BTC at 85,000: everything expires worthless. Keep 90. No downside risk.

The payoff is convex. Small moves hurt (or do nothing). Big moves pay disproportionately. The bigger the move through K2, the more the second long call dominates.

How the P&L Works​

  1. Below K1. All calls expire worthless. If entered for a credit, you keep it. Zero risk to the downside.
  2. At K2 (danger zone). Worst outcome. The short call is fully ITM, the long calls are ATM. Max loss = (K2 - K1) minus any credit.
  3. Far above K2. The 2 long calls outpace the 1 short call. Profits grow linearly. Unlimited upside.
Spot at Expiry$100k
$70k$130k
Net Credit$0k
$0k$3k
BE $95kBE $115k$0+$15k-$10k$70kK1 $95kK2 $105k$130kSpot Price at ExpiryP&L
Settlement
$100k
P&L
-5.0k
Max Loss
-$10k
Max Gain
Unlimited

When to Use​

  • You expect a large move in one direction but don't want to pay for it outright
  • You want long vol exposure that costs nothing or generates a small credit at entry
  • IV is cheap and you think realized vol will exceed implied (vol underpriced)
  • You're comfortable with the danger zone between strikes (the market needs to move through it, not stall in it)

Common Mistakes​

Common Mistakes
The mistakePutting on a backspread before a known catalyst and then watching the market move to the danger zone. BTC goes from \$95k to \$100k -- right into your max loss.
The realityThe backspread needs a big move, not a moderate one. A 5% rally to exactly your OTM strike is the worst outcome. If the catalyst is likely to produce a measured 3-7% move rather than a 15%+ explosion, a backspread is the wrong structure.
The mistakeIgnoring theta. "It was free to enter, so I'll just hold it."
The realityYou're net long options. Time decay is working against you every day. If the move doesn't come, the two long options decay faster in aggregate than the one short option. A backspread entered for zero cost can be underwater \$500-1,000 a week later even with no move.

Greeks at a Glance​

Greek
Sign
Plain English
Delta
+
Mildly positive at entry, grows with move. The second long call accelerates delta.
Gamma
+
Net long gamma (2 long vs 1 short). Big moves help you disproportionately.
Theta
-
Net long options = net time decay. The clock is not your friend.
Vega
+
Net long vega. Rising IV helps. This is a vol trade.

Related:

Last updated on