Brace for a wave of defaults in the oil patch. Energy companies that loaded up on debt during the oil boom are likely to have trouble paying back those loans. Oil prices have collapsed over 65% since the middle of last year to below $37 a barrel this week and there's no recovery in sight. It's fueling financial turmoil on Wall Street with Standard & Poor's Ratings Service recently warning that a stunning 50% of energy junk bonds are "distressed," meaning they are at risk of default. Overall, about $180 billion of debt is distressed. It's the highest level since...