Shares of some top credit card companies were down at the close of trading:
American Express Co. fell $.37 or .6 percent, to $61.91.
Capital One Financial Corp. fell $.85 or 1.6 percent, to $52.27.
Discover Financial Services fell $.60 or 1.5 percent, to $38.93.
Mastercard fell $9.95 or 1.9 percent, to $512.91.
Visa Inc. fell $2.19 or 1.4 percent, to $155.42.








