A pension fund manager is considering three assets. The first is a stock fund, the second is a long-term government and corporate bond fund, and the third is a T-bill yielding 0.05. The probability distribution of the risky funds is as follows:

	Expected ret.	std. dev.
Stock fund	0.21	0.31
Bond fund	0.12	0.14

The correlation between the fund returns is 0.3. What is the weight of stock fund in the optimal risky portfolio?