Butterfly spread maximum profit

You buy one call struck at $90 for $6.10, sell two calls struck at $100 at $2.10 each, and buy one call struck at $110 for $0.70 (same expiry). What is the maximum profit of this long butterfly, in dollars, net of premium?

Show hints (2)+
  1. Peak payoff is the strike gap; find it first.
  2. Then subtract the net premium: 6.10 − 2(2.10) + 0.70.

Answer

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7.4

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Asked at: Citadel, Optiver

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