Shares of Credit Suisse Group AG (CS) fell two percent on the rumor that United States regulators are looking at the company???s accounting practices. And that was enough downward momentum to pull broader European markets down with it. As of this writing, the Stoxx Europe 600 Index had lost 0.3 percent, after posting a gain of 4.6 percent in February alone. For investors playing European markets or Credit Suisse, a wait-and-see approach is probably your best bet.