悪あっ貨かは良りょう貨かを駆く逐ちくする

expression, suru verb (irregular)

bad money drives out good

Proverb expressing Gresham's Law: when both high-value and low-value currency are legal tender, people hoard the good money and circulate the bad, so the bad money drives the good out of circulation. Often used metaphorically in economics and social contexts.

See also: グレシャムの法則

• 悪あっ貨かは良りょう貨かを駆く逐ちくするという言こと葉ばは、経けい済ざい学がくの基き本ほん原げん則そくの一ひとつだ。

  The saying 'bad money drives out good' is one of the fundamental principles of economics.

• 市し場じょうに粗そ悪あく品ひんが出で回まわると、悪あっ貨かは良りょう貨かを駆く逐ちくする現げん象しょうが起おきる。

  When low-quality goods flood the market, a 'bad money drives out good' phenomenon occurs.