The article examines whether mutual fund managers investing their own money in the funds they manage aligns with investors' interests. They studied data from 800 mutual funds over four years and found that when managers invest more in their funds, the fund returns are lower. Additionally, higher expense fees are associated with higher managerial investments, but there is no link between management fees and manager investments. This goes against the common belief that managers investing more in their funds would benefit investors, suggesting there may be other ways to align manager and investor interests effectively.