Participants in 401(k) plans moved $270 million into equities from fixed-income investments in June, according to Hewitt's 401(k) index.
Total equity allocations rose to 53.6% of all 401(k) assets, from 49% in March, Hewitt Associates said in its monthly report.
International funds received 20.7% of all inflows in June, or $63.7 million, while lifecycle funds received 19.5%, or $60.2 million.
Stable value funds experienced the most outflows for the month, with $250 million. That represented 82.8% of all outflows.
According to Hewitt, 23.4% of participant-only contributions went into stable value funds, while 21.9% went into lifestyle funds, and 16.9% into large-cap U.S. equity funds. For overall contributions, 21.6% were invested in stable value, 21.3% were invested in lifestyle funds, and 15.6% moved into large-cap U.S. equity funds.