"Mutual fund companies are trying to juice returns of target date funds by giving their managers more leeway to make tactical bets on stock and bond markets, even though this could increase the volatility and risk of the widely held retirement funds.... Fund sponsors say they aren't putting core strategies in danger -- many only allow a shift in the asset allocation of 5 percent in one direction or another -- and say they actually can reduce risk by freeing managers to make obvious calls."  MORE >>