 Shares of iQiyi Inc. IQ, -17.26 plunged 17.2 in afternoon trading Tuesday, putting them on track for the biggest one-day drop in 10 months, after the China-based streaming-video company took advantage of a recent surge in prices to announce a large stock offering. The company said before the open that an offering of 76.5 million American depositary shares ADS priced at 5.90 per ADS, for net proceeds of 442.3 million. 