Cisco Systems Inc. ( CSCO ) was the biggest blowup of the week. Sure, other stocks had much larger percentage drops, but not among DJIA components. Its earnings blunder and guidance seem to be magnified by China and international companies pushing back over technology that may be allowing US spy agencies better access into data. All in all it was a huge disappointment. We tracked many analysts cutting their ratings after the report and the expected price target in a year fell by about 10%. John Chambers now has to rethink his turnaround and restructuring plan. Cisco managed a gain of less than 1% on Friday to $21.53, but this still closed down 10.3% from before the earnings report.