To be expected: the Federal Trade Commission is investigating for any antitrust concerns two big online advertising mergers: it will review Microsoft’s $6 billion bid for aQuantive and Yahoo’s $680 million deal for the 80 percent of Right Media, reports WSJ. It is already investigating Google’s $3.1 billion bid for DoubleClick. Such reviews are required under the Hart-Scott-Rodino antitrust act, which seeks to ensure that mergers don’t lessen competition or lead to higher prices for consumers.