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in june 2009, GM has filed for bankruptcy. trading has moved from NYSE to OTC pink sheets, and the symbol changed to GMGMQ and later to MTLQQ. in november 2010 a new GM symbol started trading on NYSE. i am looking for the regulations regarding stock symbol reuse in the US. is there a minimum time that the symbol has to be out of use before it can be reused?

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You want to distinguish between reusing a symbol for different entities vs essentially the same entity (e.g. pre- and post-bankruptcy General Motors). – smci Jun 29 '13 at 6:46

I doubt it is regulated per se. Tickers are part of the listing contract between a new entity and the primary listing exchange. The exchange will seek to please the new client with a ticker they want, while also trying to please its existing members by assigning tickers in a logical, mnemonic way.

Since both the revitalized company and the markets expected a re-use of the GM ticker, that's what happened.

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how about any statistics or examples about minimal recycle times? – eyaler Apr 10 '12 at 23:36

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