dumb money
Noun
Meaning
dumb money (uncountable)
(collective, finance) Individual, noninstitutional investors considered as a group; by extension, the money invested by such people.
Antonym: smart money
Antonyms
Examples
The big Wall Street firms, seemingly so shrewd and self-interested, had somehow become the dumb money. The people who ran them did not understand their own businesses, and their regulators obviously knew even less.