When should you buy or sell Cisco Systems stock?

Analyzing Cisco Systems' last two earnings reports is one way to decide whether to buy or sell the company' stock. The earnings report displays whether a company is growing its sales, notes Investopedia. Larger companies such as Cisco Systems should display growth of at least 3 percent.

Understanding the sales line helps when deciding about buying or selling stocks. Companies with growing general and administrative expense lines are often suffering from poor expense management, says Investopedia.

Major companies such as Cisco Systems often release a future earnings guidance to Wall Street. If the numbers are higher than what experts predict, the company has the potential to surprise, states Investopedia.