With the first anniversary of the Dodd-Frank financial reform law on July 21, ... what has it accomplished? Consumer advocates, many congressional Democrats and some economists say banks are still too big, the derivatives market remains untamed and opaque, and regulators have been slow to write hundreds of rules. Rules forcing most derivatives trades to be processed through clearinghouses, and backed by collateral, should ... be accepted globally to avoid regulatory arbitrage, in which trading firms move to countries with the least intrusive, and lowest cost, oversight. Less than three years ago, the financial system almost buckled under the weight of worthless mortgages, and the country narrowly avoided another Great Depression. Regulators had been blind to the credit boom and bust; banks took huge risks that exploited regulatory gaps. Today, the economy remains weak ... because of the lingering fallout of the financial crisis. Dodd-Frank isn't perfect, but already its influence on the financial system has been positive, in ways big and small. Accounting is more transparent; off-balance-sheet assets are largely a thing of the past. [Yet] with the top 10 U.S. banks holding 77 percent of the industry's domestic assets, compared with 55 percent in 2002, too-big-to-fail is an even bigger worry today. Thomas M. Hoenig, the Kansas City Federal Reserve president, has said that the incentives for risk-taking that existed before the crisis all remain in place.