Citi Downgrades Weibo On Alibaba Uncertainty, Sina On Valuation By: Benzinga via Benzinga October 29, 2015 at 10:07 AM EDT Weibo Corp (ADR) (NASDAQ: WB) shares have surged 52 percent since September 30, while shares of SINA Corp (NASDAQ: SINA) have ... Read More >> Related Stocks: Sina Corp Weibo Corp ADR