Cisco Systems stock falls more than 4% on high trading activity
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Cisco Systems (NASDAQ:CSCO) shares fell 4.5% Wednesday amid reports that a series of unusual options trades had been made involving the networking-technology giant's stock.
The activity came on the heels of a block of $400,000 in put contracts being sold on Tuesday. There appeared to be no other major details about who was behind the activity in Cisco (CSCO) stock.

Separately, on Tuesday, cybersecurity agencies in the United States and United Kingdom disclosed that a Russian state-sponsored hacking group operated by Moscow's military intelligence has been using a six-year-old vulnerability in Cisco routers to send out malware and run surveillance operations on U.S. and European institutions and organizations.
Trading in Cisco (CSCO) shares was heavy, as 15.4M shares of the company's stock had been traded by Wednesday afternoon. Cisco (CSCO) averages 18M shares exchanged on a daily basis.
Wall Street analysts and Seeking Alpha authors both currently have consensus buy ratings on Cisco's (CSCO) stock, while Seeking Alpha's Quant System, which historically outperforms the stock market, gives Cisco's shares a rating of hold.