Black market = கறுப்புச் சந்தை

Grey market / gray market
noun
1. trading in shares before issue: trading in new shares before they have been officially issued on the stock exchange
2. secret trading in goods: clandestine but legal trading in goods either at excessively high prices or at prices well below the manufacturer's recommended price.

Microsoft Encarta 2009.


A grey market or gray market also known as parallel market[1] is the trade of a commodity through distribution channels which, while legal, are unofficial, unauthorized, or unintended by the original manufacturer. The term gray economy, however, refers to workers being paid under the table, without paying income taxes or contributing to such public services as Social Security and Medicare.[2] It is sometimes referred to as the underground economy or "hidden economy."

கறுப்புப்பண சந்தை
Ref: http://www.termwiki.com/TA:grey_market_₁

A part of the capital market that is unregulated or not under government supervision. The grey market is a market where securities that have not been issued yet are traded before closing of the subscription period. The grey market is a kind of futures market, as the investor buys shares through the bank at the grey market price before the opening price is set.

அரசாங்கத்திற்குத் தெரியாமல், வரி ஏய்ப்பு செய்து, சட்டத்திற்கு விரோதமான பொருட்களை, அல்லது சட்டத்திற்கு விரோதமான குழுக்களுக்கு, ஆட்களுக்கு விற்பனை செய்வது, அல்லது கொடுக்கல் வாங்கலில் ஈடுபடுவது தான் கள்ளச் சந்தை (grey market).