Answer:
expected profit = -$ 1 ( this means that you incurred a loss )
Explanation:
Given that the alpha is calculated as : X / 100%
And
stock A has a spread of = 0.2% and has gone up by 10% and 15%
The alpha = 10 / 100% = 0.10%
Hence when you take a $1000 position the profit = 1000 * (0.001 - 0.002 )
= 1000 * (-0.001 ) = -$1