Gresham's law

== English == === Etymology === Named in 1858 by Henry Dunning Macleod, after Sir Thomas Gresham (1519–1579), English financier during the Tudor dynasty. === Proper noun === Gresham's law An economic principle stating that, when a government overvalues one type of money and undervalues another, the undervalued money will leave the country or disappear from circulation into hoards, while the overvalued money will flood into circulation; or "bad money drives out good".