Ouch! None that I know of, Akki.
The only option that I know of is to restore your latest backup (to another location), get the data as it existed before the update, and then carefully recover the data you need.
Often times, when I have to make critical changes on a production server, I do the following:
UPDATE SEcurities SET MarketPrice = 598.55 WHERE TICKER = 'AAPL';
COMMITI would run step 1, take a quick look to make sure it updated only one row, and then run step 3 if all seems well. Even this is dangerous on a production server, because you may be locking up a page, or more or locking up some hot rows etc.