Slowing growth, looser underwriting and increasing regulation are likely to tap the brakes on the joyride U.S. auto lenders have enjoyed in recent years, according to recent research from Standard & Poor’s Ratings Service. “Despite the robust performance of the auto sector in the past few years, we believe bumpier roads may lie ahead,” S&P Credit Analyst Igor Koyfman said in a recent report. “As lenders compete for market share, they have extended loan terms and increased the average financing amount, while yields have declined.” Lenders have also increased...