NEW YORK (Reuters) - Strategists at the world's largest asset manager BlackRock Inc told their financial adviser clients on Wednesday to look at cutting back on risk and lower expectations for high returns on stocks and bonds."We may get another leg-up from earnings but I would say the type of returns we experienced in the first quarter should not be extrapolated," BlackRock's chief equity strategist Kate Moore said during its quarterly U.S. wealth advisory event, which was attended over the web..