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blue-sky law

American  

noun

  1. a law regulating the sale of securities, real estate, etc., especially such a law designed to prevent the promotion of fraudulent stocks.

blue-sky law British  

noun

  1. a state law regulating the trading of securities: intended to protect investors from fraud

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of blue-sky law

An Americanism dating back to 1910–15

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.