Report: IRS May Snarl Yahoo's Alibaba Spin-Off By: Benzinga via Benzinga May 20, 2015 at 08:39 AM EDT Yahoo! Inc. (NASDAQ: YHOO) shares sank more than 7 percent Tuesday on news that its pending spin-off of a stake in Alibaba Group ... Read More >> Related Stocks: Alibaba Group Holding Ltd Irsa Inversiones Y Representaciones S.A. ADR Yahoo