The majority of dollars that wealthy investors formerly allocated to workplace-based retirement accounts like 401(k)s and 403(b)s are now being poured into individual retirement accounts, according to a report by Cogent Research LLC.

The report, "Investor Assets in Motion: IRA & Retirement Marketplace Opportunities," surveyed 4,000 affluent and high-net-worth Americans nationally and found that while ownership of both IRAs and employer-sponsored retirement plans has declined since 2006, ownership of 401(k) and 403(b) accounts have tumbled further.

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