美国消费者可用信用额度有所下降。 Retail sales and credit, key gauges of spending habits, will plummet this quarter unless consumers get an infusion of cash. That's shown by the Bloomberg credit impulse, a measure that captures the change in the flow of credit to the economy. It's calculated by the year-over-year rate of change as a percent of GDP. This impulse leads both consumer revolving credit and retail sales.