For the first time since the start of the Great Recession, more money in 401(k) accounts flowed out of bond funds than into them in 2013, according to an Aon Hewitt analysis.

A half a decade of strong stock performance, with double digit increases last year alone, left its mark on 401(k) allocations, with equities reclaiming their traditional place in participant portfolios. In all, 34.8 percent of all allocations were in bonds, compared to a high 52.3 percent at the end of 2007. The average since the index was started in 1997 has been 35.4 percent allocated to bonds.

Along with rising stock prices, transfers from fixed income funds helped change the balance of allocations. Aon Hewitt's 401(k) Index also found that $2.82 billion was transferred to equities, the largest such move since 2003.