Money manager's fortune dwindling after horrid bets on Washington Mutual and Countrywide Financial, others. Investors now fleeing: assets down 30% to $86 billion since last fall. Investment guru born in Pittsburgh, majored in economics at Bucknell. Graduate studies at San Diego State. Borrowed investment philosophy from Benjamin Graham; identifies companies whose stocks are trading below intrinsic value. Founded Brandes Investment Partners in 1974.