WASHINGTON, Oct 21 (Reuters) - The U.S. Federal Reserve on Thursday banned individual stock purchases by top officials at the central bank and unveiled a broad set of other restrictions on their investing activities roughly six weeks after reports of active trading by some senior policymakers triggered an ethics uproar. Following is a full text of the Fed’s announcement: Following a comprehensive review, the Federal Reserve Board on Thursday announced a broad set of new rules that will prohibit the purchase of individual securities, restrict active trading, and increase the timeliness of reporting and public disclosure by Federal Reserve policymakers and senior staff. As a result of the new policies, senior Federal Reserve officials will be limited to purchasing diversified investment vehicles, like mutual funds. The new restrictions will apply to both Reserve Bank and Board policymakers and senior staff and prohibit them from purchasing individual stocks, holding investments in individual bonds, holding investments in agency securities (directly or indirectly), or entering into derivatives. The new rules are expansive and are designed to place the Federal Reserve’s investment and trading rules at the forefront among major federal agencies. “These tough new rules raise the bar high in order to assure the public we serve that all of our senior officials maintain a single-minded focus on the public mission of the Federal Reserve,” said Federal Reserve Board Chair Jerome H. Powell. To help guard against even the appearance of any conflict of interest in the timing of investment decisions, policymakers and senior staff generally will be required to provide 45 days’ advance notice for purchases and sales of securities, obtain prior approval for purchases and sales of securities, and hold investments for at least one year. Further, no purchases or sales will be allowed during periods of heightened financial market stress. Reserve Bank presidents now will be required to publicly disclose financial transactions within 30 days, as Board Members and senior staff currently do. The Board and the Reserve Banks will incorporate these new restrictions into the appropriate Federal Reserve rules and policies over the coming months. (U.S. economics team)