Increased risks from such factors as fluctuating oil prices and bird-flu fears have prompted fund managers to slightly reduce their stock portfolios and allocate more to bonds and cash, according to a Reuters survey. The poll of 44 top funds firms in the U.S., U.K., Japan and continental Europe found that assets in equities dipped to 61.1% at the end of January, down from 62% in December. Bond holdings rose from 31.4% to 31.6% and cash from 3.9% to 4.2%. Cuts in equities in the U.S. were greater, falling from 68.5% in December to 65.9% last month, but unlike Europe, holdings in bonds and cash also fell.