Excess returns for stocks are determined by finding the difference between the return for a stock and the returns of firms in the market that have similar levels of risk. Suppose stocks listed on an exchange have a mean monthly excess return of $1\%$ and a standard deviation of $0\mathrm{.}5\%.$ We want to find the probability of a randomly selected stock resulting in a negative monthly excess return. Assume that the monthly returns are normally distributed.

What is the probability $($expressed in percentage$)$ of getting a negative monthly excess return? Pick the closest value.

Group of answer choices

$1\%$

$2\%$

$5\%$

$10\%$

$50\%$

None of the above.