Biotech and healthcare stocks were quite active today. We saw substantial moves across the board, both up and down. In the biotechs classroom, we received some solid entry signals, all to the upside. The best was PKI, which was up over 8% for the day. We also saw a lot of volatility in EXAS after posting earnings. The company missed on revenue and its outlook was lower than expected as well. Here’s an overview of today’s action.