Bullish option flow detected in Cassava Sciences with 2,243 calls trading, 1.0x expected, and implied vol increasing almost 15 points to 103.60%. 5/3 weekly 22 calls and 5/10 weekly 24.5 calls are the most active options, with total volume in those strikes near 1,600 contracts. The Put/Call Ratio is 0.10. Earnings are expected on May 2nd.