Federal banking regulators this week issued credit risk management guidance on one of the fastest-growing products in the mortgage market: home equity loans. Agency officials said that “in many cases, institutions’ credit risk management practices for home-equity lending have not kept pace with the product’s rapid growth and easing of underwriting standards.” The guideline was jointly issued by the Office of Thrift Supervision, Office of the Comptroller of the Currency, Federal Reserve Board, Federal Deposit…