A roundup of tech ratings changes

|By:, SA News Editor

Twitter (TWTR) has been started at Neutral by Sterne Agee. Shares -1.4% premarket after dropping 7% on Friday in the wake of neutral/bearish coverage launches. Shares still +58% from their $26 IPO price.

Veeva Systems (VEEV) has received four bullish ratings and two neutral ones on underwriter coverage day. Shares +0.6%.

American Tower (AMT) has been upgraded to Buy by Citi.

Youku (YOKU) has been upgraded to Buy by Brean ahead of Thursday's Q3 report. Shares +3.1%.

BT has been upgraded to Overweight by JPMorgan after outbidding Sky for the U.K. TV rights to Champions League games.

Netgear (NTGR) has been upgraded to Sector Perform by RBC.

Deutsche Telekom (DTEGY, DTEGF) has been cut to Sell by Goldman after striking a $729M deal to buy wireline carrier GTS Central Europe.

Lam Research (LRCX) has been cut to Neutral by Susquehanna.

Diodes (DIOD) has been cut to Outperform from Strong Buy by Raymond James ahead of tomorrow's Q3 report.