Diamond Hill Investment Group, Inc. Announces New Sub-Advisory Relationship

Diamond Hill Investment Group, Inc. (NASDAQ:DHIL) today announced that the Boards of Trustees of Nationwide Mutual Funds and Nationwide Variable Insurance Trust approved the addition of Diamond Hill Capital Management, Inc. (“Diamond Hill”) to subadvise a portion of the Nationwide Fund and the NVIT Nationwide Fund (“the Funds”), respectively. The portion of the Funds to be managed by Diamond Hill is expected to total approximately $800 million and will be transitioned on or after October 18, 2010.

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