It would appear that LXRX (Lexicon Pharmaceuticals) experienced a "flash crash" this morning. Google Finance shows a 0.69 intraday low (as does NASDAQ.com), but CAPS shows the low as 1.33. The recovery was so quick (now at 1.43) that my limit outperform at 1.39 never triggered.
(Kitco News) -CME Group is hiking silver margins again, with a late-Wednesday notice the fourth such announcement in the last two weeks. [more]