Credit ratings agency Standard & Poor's having downgraded U.S. debt on Friday isn't what caused stocks to have the worst day since the credit crisis, Cramer said Monday. The "Mad Money" host thinks the machines of the high-frequency traders are to blame.

"You have to believe that it's related to the machines because the sell off was in total lock step," Cramer said. "It's not acknowledging that gasoline prices are coming down and raw energy declines are good for many stocks. It's not even acknowledging the positives for gold stocks, and gold is off the charts."