EFF/KRF: The recent sharp decline in prices suggests that the market does not think the actions of the government (including the stimulus plan) are, in aggregate, good for the economy. If you think the market has it right, then expected stock returns are high, for the reasons outlined above. If you are more pessimistic than the market about the effects of government actions, then (at least on this score) you think prices are too high, which means expected returns are low. Conversely, if you are more optimistic than the market about the effects of government actions, then you think prices are too low, which means expected returns are quite high. Keep in mind, however, that the empirical evidence says you are on thin ice when you decide your forecast of the future is better than the market's.
Eugene Fama and Ken French are members of the Board of Directors for and provide consulting services to Dimensional Fund Advisors LP.