Treasury bills are paying a 4% rate of return. A risk-averse investor with a risk aversion of A = 4 should invest entirely in a risky portfolio with a standard deviation of 24% only if the risky portfolio's expected return is at least

The answer A predominantly Pashtun movement, the Taliban came to prominence in Afghanistan in the autumn of 1994. It is commonly believed that they first appeared in religious seminaries - mostly paid for by money from Saudi Arabia - which preached a hard line form of Sunni Islam.