The first question to ask about any market-share figure is "Of what market?" Goldman Sachs are defining things using a much broader market than most people woul

The first question to ask about any market-share figure is "Of what market?" Goldman Sachs are defining things using a much broader market than most people would consider useful. Maybe there's something to it, but to call it "true market share" at this point is more than a bit of a reach.