Forbes and Barron's recommend Global Penny Stocks, a site that selects penny stocks that trade on the AMEX, NYSE and NASDAQ for less than $5.
You will only have to pay a small percentage of the transactions made with an Amex card.
You can be fairly sure that once you start accepting Amex cards you will see these cards used for purchases time and again.
The current interest rate offered by American Express for this particular card can be found on the AMEX webpage.
American Express decided to make the rumor a reality in 1999 by introducing the Amex Centurion Card.