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system
historical stock price quote on delisted stock without knowing stock symbol as of quote date
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you need a source of delisted historical data.  such data is typically only available from paid sources. according to my records 20 feb 2006 was not a trading day - it was preisdent's day and the us exchanges were closed. the prior trading date to this was 17 feb 2006 where the stock had the following data: open: 14.40 high 14.46 low 14.16 close 14.32 volume 1339800 (consolidated volume) source: symbol nve-201312 within premium data us delisted stocks historical data set available from http://www.premiumdata.net/products/premiumdata/ushistorical.php disclosure: i am a co-owner of norgate / premium data.
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