The phrase "prudent man" refers to someone who is wise, careful, and cautious in their actions and decisions. It implies that they use good judgment and think sensibly before making choices. Full definition
What prudent man puts his head in the mouth of a lion? (religion-online.org)
The personal computer business was built on top of the semiconductor business about the same time that the last of the pieces of Venture Capital were falling into place — the 1979 change in the EISRA «prudent man» rule allowing pension funds to pour billions into Venture Funds. (foundersblock.com)
The only recent reference we found is in the most recent FAQ, where it cites the Prudent Man standard, which states that a fiduciary will act (newconstructs.com)