Why This Top-Notch Trio Of Biotech Stocks Just Took A Tumble

Top-notch biotech stocks TG Therapeutics (TGTX) and Twist Bioscience (TWST) took a tumble Monday on mixed second-quarter reports that both featured earnings misses. For TG Therapeutics, the miss was due to analysts underestimating operating expenses, Evercore ISI analyst Michael DiFiore said in a report. The company earned 5 cents a share, well below the Street's forecast for a 31-cent gain.…