 Guggenheim Capital LLC increased its position in shares of BlackRock MuniHoldings Fund Inc. NYSE:MHD by 14.6 during the first quarter, Holdings Channel.com reports. The institutional investor owned 256,435 shares of the companys stock after purchasing an additional 32,583 shares during the period. Guggenheim Capital LLCs holdings in BlackRock MuniHoldings Fund were worth 3,995,000 as of ... 