Shares in Yahoo! rose on speculation the Internet portal is an acquisition target now that Time Warner and America Online have merged. Viacom, Walt Disney Co. and News Corp. are considered possible acquirers. Analysts are skeptical, including Merrill Lynch's Henry Blodget, who said it was more likely an outside company might acquire a stake in Yahoo! as a strategic investment. Yahoo! slipped in Friday trading, closing at $33.81, up 27.29% for the week.