Target-date funds are proving most popular among women and younger retirement investors, according to MassMutual's Retirement Services Division.
In the first quarter of this year, 28.4% of women's retirement savings were in asset allocation accounts, compared with 27.7% of men's retirement savings, MassMutual data showed.
Those allocations have jumped by 42% for women over the past five years, and increased 38% for men.
In addition, the data found that millennials, those between the ages of 20 and 37, are moving into target-date funds and other asset allocation strategies more than Generation Xers, those ages 36 to 48, baby boomers, those ages 49 to 68, or members of the Silent Generation, those ages 69 and older.
In the first quarter of 2014, 52.1% of the retirement savings for millennials were in asset allocation accounts, up 3.3% from the same period last year.