 Guggenheim Capital LLC lessened its holdings in Mainstay Definedterm Municipal Opptys Fd NYSE:MMD by 50.3 in the 4th quarter, according to its most recent 13F filing with the Securities Exchange Commission. The firm owned 40,444 shares of the closed-end funds stock after selling 40,907 shares during the period. Guggenheim Capital LLCs holdings in Mainstay ... 