Consider a long straddle constructed from options which have an expiration date of January 14, 2022. The following table displays the possible prices of Acme stock on January 14, as well as the payoffs accruing to someone who holds a long straddle on Acme stock:

Probability	0.2	0.3	0.2	0.2	0.1
Stock Price	$80	$90	$100	$110	$120
Gain from long straddle	$20	$10	$0	$10	$20

Why would someone buy a long straddle? Explain carefully.