Goldman Sachs Group Inc. is appealing a decision by European Union antitrust authorities that underscores the legal risks "that may be faced by private equity firms whose portfolio companies become embroiled in cartels," the Wall Street Journal reports. The appeal, filed with the General Court in Luxembourg, challenges the 37 million euro ($51 million) penalty imposed on Goldman in April over its involvement in a power cable cartel price-fixing scandal. Goldman shared the monetary penalty with an Italian cable maker that the bank's private-equity arm had purchased in 2005 but sold by early 2010.