TheStreet's Action Alerts PLUS Co-Portfolio Manager Jim Cramer says Yahoo! is in a difficult position because the stock has gone from $19 to $40 mostly because of Alibaba, not CEO Marissa Mayer. Cramer says Yahoo! stock has more downside because Alibaba is slowing and Yahoo! is under-invested. The company has made acquisitions and grown viewership but it is not producing more profit because other internet companies such as Google and Facebook have better technology.