TOKYO (Reuters) - U.S.-based investment fund Harris Associates said in a regulatory filing on Thursday it has raised its stake in Japan's Olympus Corp <7733.T> to 5.88 percent as the camera and medical equipment maker seeks capital tie-ups with the likes of Sony Corp <6758.T>.

The increased stake, made by July 13, makes Harris the second-biggest shareholder in Olympus after Mitsubishi UFJ Financial Group, the Nikkei newspaper's website said.

Shares in Olympus, seeking to emerge from a $1.7 billion accounting scandal, ended morning trade down 2.8 percent, underperforming a 1.7 percent rise in Tokyo's electric machinery index <.IELEC.T>.

(Reporting by Mayumi Negishi; Editing by Michael Watson)