Its repeal later became the subject of much debate, with some advocating its reinstatement. On July 15, 2008, Cox told a U.S. House hearing that the Commission was studying the potential institution of "a price test that could work with an increment of a nickel or dime" or some more meaningful amount. Technological modernization of the SEC was a Cox priority throughout his tenure. He introduced new technology for investor disclosure, compliance analytics, nationwide investigative work sharing, and management of funds recovered for investors. In August 2008 he rolled out the future replacement of the SEC's forms-based disclosure database, called EDGAR, with a new interactive disclosure system using computer-tagged data in the eXtensible Business Reporting Language (XBRL). The new system was designed to let future investors easily search, sort, and recombine information to generate reports and analysis from hundreds of thousands of companies and millions of forms. Under Cox the SEC oversaw the creation of a taxonomy of over 11,000 XBRL data tags that catalog every element of U.S. Generally Accepted Accounting Principles. In 2008 the Commission issued rules requiring all publicly traded companies and mutual funds in the United States to tag their financial information. Another Cox technology initiative liberalized the proxy rules to allow investors and companies to use Electronic Shareholder Forums—virtual meeting places on the Internet to promote shareholder initiatives, conduct straw polls, apprise a company's directors of critical shareholder concerns, and inform shareholders of management's and directors' views. In 2006 the SEC launched a war against Internet financial spam, shutting down trading in companies that touted their stock by clogging investors’ in-boxes. Investor complaints about the practice fell from more than 220,000 per month in December 2006 to 70,000 per month in February 2007; Internet software and services company Symantec credited the SEC with cutting financial spam by 30 percent. These technological initiatives were widely supported, with one observer noting that Cox "earned virtually universal plaudits for efforts to modernize technology, transparency, and understandability of corporate reports, and to provide for apples-to-apples comparisons (for the first time ever) of corporate executive compensation." The particular needs of senior investors, whose ranks are growing rapidly, was a special Cox focus. In April 2006, the SEC held its first “Seniors Summit”, working with AARP, the Financial Industry Regulatory Authority, the North American Securities Administrators Association, and several state regulators; the conferences are now held annually. A nationwide sweep examination conducted by the SEC and authorities in seven states found that "free lunch" investment seminars, which draw large numbers of retirees, routinely involved significant fraud.