Tropical Depression Ten was a tropical depression of the record-breaking 2005 Atlantic hurricane season. It formed on August 13 from a tropical wave that emerged from the west coast of Africa on August 8. As a result of strong wind shear, the depression remained weak and did not strengthen beyond tropical depression status. It degenerated on August 14, although its remnants partially contributed to the formation of the tropical depression which eventually became Hurricane Katrina. Thus, it is generally referred to as "the precursor to Katrina". The cyclone had no effect on land, and it did not directly result in any fatalities or damage.
A black market, underground economy, or shadow economy is a clandestine market or transaction that has some aspect of illegality or is characterized by some form of noncompliant behavior with an institutional set of rules.