According to The Kobeissi Letter, total consumer credit in the US surged by a record $40.8 billion in December, marking a sharp turnaround from a $5.4 billion decline in November. This increase was largely driven by a $22.9 billion rise in revolving credit, which includes credit cards, suggesting increased consumer spending and potential impacts on interest rates and inflation. Traders should monitor these economic indicators closely as they could influence monetary policy decisions.