The FTC has given investor Carl Icahn the right to buy more shares of Yahoo (NSDQ: YHOO), according to Reuters. When Icahn’s stake in Yahoo was first confirmed earlier this month, he said it was his intention to get approval to buy up to $2.5 billion worth of shares in the company. Now well see, given all of the latest developments (or non-developments, more accurately), whether he follows through on the share buy.