A $46 billion bad-loan mirage hints at flaw in U.S. lender guideline An early-warning system for bad loans from banks is using impact this season. Beware untrue alarms. U.S. finance companies tend to be just starting to reserve conditions for prospective loan losings under a unique system regulators created eight years back to avoid the type of catastrophic shock that caught the business and regulators off shield throughout the crisis that is financial. The theory is always to force finance…