Tech ratings change roundup: 3D Systems, Seagate, SolarCity, SanDisk

|About: 3D Systems Corp. (DDD)|By:, SA News Editor

3D Systems (DDD -3%) has been cut to Neutral by Credit Suisse.

Seagate (STX +2.1%) has been upgraded to Overweight by Morgan Stanley, and rival Western Digital (WDC +0.5%) has been upgraded to Outperform by BMO. Wesern reports tomorrow, and Seagate on Jan. 27.

SolarCity (SCTY -3.3%) has been cut to Neutral by JPMorgan. Deutsche started shares at Buy last week.

SanDisk (SNDK -2.3%) has been cut to Neutral by BofA/Merrill. Q4 results arrive tomorrow.

NetApp (NTAP +2.2%) has been upgraded to Buy by Lake Street Capital.

InvenSense (INVN -2.8%) has been cut to Hold by Needham.

FireEye (FEYE -3.7%) has been cut to Neutral by JPMorgan following a huge run-up in the wake of the Mandiant deal and the company's guidance hike.

Altera (ALTR +2.8%) has been upgraded to Overweight by JPMorgan ahead of Wednesday's Q4 report.

Tibco (TIBX -2.4%) has been cut to Neutral by Wedbush. Shares rallied last week on a report suggesting Dan Loeb is set to make an activist push.

NetSuite (N +1.1%) has been upgraded to Buy by Maxim.

Violin Memory (VMEM -3.7%) has been cut to Underweight by Barclays.

Motorola Solutions (MSI +1.8%) has been upgraded to Buy by Citi.

LG Display (LPL +3.2%) has been upgraded to Buy by BofA/Merrill.