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

Blue Sky Laws
State regulations designed to protect investors against securities fraud by requiring sellers of new issues to register their offerings and provide financial details. This allows investors to base their judgments on trustworthy data.
Investopedia Commentary
The term is said to have originated in the early 1900s when a Supreme Court justice declared his desire to protect investors from speculative ventures that had "as much value as a patch of blue sky."
Related Links
Investment Scams Tutorial
See also: Boiler Room, Bucket Shop, Bucketing, Churning, Circular Trading, Front Running, OTC Market, Poop and Scoop, Pump and Dump, SEC
blue sky laws
blue sky.