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WASHINGTON – Federal Reserve Chairwoman Janet Yellen said Wednesday that she doesn’t see a need for the Fed to start raising interest rates to defuse the risk that extremely low rates could destabilize the financial system.

Yellen said she does see “pockets” of increased risk-taking. But she said those threats could be addressed through greater use of regulatory tools. Many of those tools, such as higher capital standards for banks, were put in place after the 2008 financial crisis, which triggered the Great Recession.

In her remarks at a conference sponsored by the International Monetary Fund, Yellen disputed criticism that the Fed had contributed to the 2008 crisis by keeping rates too low earlier in the decade.

Yellen acknowledged that financial stability risks “escalated to a dangerous level in the mid-2000s” and that policy-makers overlooked the vulnerabilities in the financial system that would make the subsequent decline in home prices so destabilizing. She included herself in this group of policymakers.

She said the government has made progress since then in closing the regulatory gaps that allowed the financial crisis to erupt.

Yellen spoke one day after the Dow Jones industrial average set a record for the stock market.

Some critics of Fed policies have warned that the central bank could be setting the stage for another dangerous bubble by keeping rates so low for so long.