Momentum stocks have their worst day yet

|By:, SA News Editor

Following a two-day rebound, high-beta tech stocks are seeing monumental losses once again. The Nasdaq is closing with its biggest one-day decline since 2011 (eclipsing last week's 110-point drop).

Security hardware/software providers were hard-hit following Imperva's (IMPV -43.8%) big warning: FEYE -11.6%. PANW -6.4%. PFPT -9.8%. FFIV -4.7%. KEYW -6.5%. FTNT -6.9%. QLYS -10.4%.

Other high-beta enterprise names didn't fare much better: DATA -10%. SPLK -10.3%. WDAY -9.3%. VRNS -8%. EOPN -7.9%. FIO -7.6%. BLOX -9.7%.

Major Internet decliners: P -11%. YELP -10.6%. ZNGA -6.6%. YY -7.3%. QIHU -9.3%. SINA -6.6%.

Solar: TSL -10.4%. CSIQ -10.4%. JKS -7.9%. SPWR -7.4%. JASO -6.8%. CSUN -8.2%.

3D printing: DDD -10.6%. VJET -13.3%. ONVO -8.1%. XONE -7.7%. SSYS -6.7%.