On the short term, the market typically operates on expectations, and "buy the rumor / sell the fact". Just because an actual draw may have come in larger than consensus expectations, that does not mean that people trading CHK agreed, as they may have thought differently and traded on those expectations.
Short term market moves are also affected by human mass psychology, which is almost always impossible to quantify and predict. Today, the market is dropping a lot, and for the second day in a row. I suspect the trading mentality is that we might be in short term correction, and it is better either to not buy, or to sell and take profits, and then get back in when one thinks the market is leveling off.