 Shares of Monmouth Real Estate Investment Corp. surged 5.9 in premarket trading Monday, after investment management firm Blackwells Capital LLC said it made an unsolicited bid to buy Monmouth in a deal that values the real estate management company at about 1.77 billion. Blackwells said it will pay 18.00 a share in cash for each Monmouth share outstanding, which is 5.9 above Fridays closing price of 16.99. 