The correlation coefficient between X and Y must be _______ in order for the investor to improve their Sharpe ratio by holding both X and Y in their portfolio.

Asset	Expected Return	Standard Deviation
Risk-free	2%	0%
Stock X	6%	20%
Stock Y	10%	40%

Question 5 options:

	less than 1
	less than 0.5
	less than 0
	equal to -1
	less than -0.5