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English definition of “blue-sky laws”

blue-sky laws

noun [plural]     LAW, STOCK MARKET
laws that exist in US states to prevent people from trading shares on the stock market in a dishonest way: Blue sky laws, so named because they focussed on the sale of issues that had the value of blue sky, related only to state-issued securities.
(Definition of blue-sky laws noun from the Cambridge Business English Dictionary © Cambridge University Press)
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