NEW YORK (TheStreet) -- After rallying over 2% on Tuesday, shares of Yahoo! traded higher in the after-hours session after beating on earnings and revenue.a But there are still some concerns about the company's core business, said Tim Seymour, managing partner of Triogem Asset Management. The stock could be worth upwards of $50, especially if it is able to realize its Alibaba gains in a tax-efficient manner.a Must Read: 10 Stocks Carl Icahn Loves in 2014 Yahoo!'s earnings results "were good enough," according to Guy Adami, managing director of stockmonster.com.