ETF News

UPDATE 1-Wellington Mmgt asked for documents by U.S.-report

* Bloomberg report Boston asset manager reviewing records

* Previously named as receiving research firm e-mail

BOSTON, Nov 23 (Reuters) - Wellington Management Co received a request for documents from federal investigators looking into insider trading, Bloomberg News reported Tuesday, citing an unidentified source.

The probe is part of what is said to be the broadest investigation by U.S. officials to date into insider dealing on Wall Street. On Monday the Federal Bureau of Investigation searched the offices of three hedge funds.

A Wellington spokeswoman declined to comment. The closely held Boston asset manager was among three mutual fund firms previously identified in media reports as having received an email from a Portland, Oregon firm that specializes in providing specialized research to investors.

In the email the firm described an approach by the FBI seeking its cooperation in a broad investigation, the Wall Street Journal reported.

Wellington had previously declined to comment on the email, as did the two other fund firms named as receiving it, Janus Capital Group Inc JNS.N and MFS Investment Management of Boston. (Reporting by Ross Kerber, editing by Gerald E. McCormick)