WASHINGTON - The Securities and Exchange Commission should expand to municipal bonds and other securities the rules it proposed last year to enhance the transparency and limit conflicts of interest for structured products' ratings, securities industry and mutual fund trade groups told the SEC.

They made their remarks in comment letters sent to the SEC as the two largest rating agencies - Standard & Poor's and Moody's Investors Service - urged the commission to reconsider a separate proposal that would require the rating agencies to publish the histories of all of their issuer-paid ratings after a 12-month lag.

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