Grubb & Ellis Co. (NYSE: GBE) added 18.26 percent in price Monday to $1.36. Volume of 1,407,630 shares proved more than four times its full-day average. GBE is a leading real estate services and investment firm out of Santa Ana, Calif.

Microsoft Corp. (Nasdaq: MSFT) traded in 33,909,397 shares, making it a volume leader, but still below its daily average of 61,214,100. Share prices moved down 0.37 percent to $27.80. Microsoft and China Mobile signed a strategic cooperation memorandum on Friday.

SGOCO Technology, Ltd. (Nasdaq: SGOC) gave back 37.12 percent in price Monday to $5.03, on volume of 230,400 shares, its daily average not available at press time. The Chinese-based SGOC is a national distributor, designer and manufacturer of flat panel displays.