The stock was last quoted at $26.50, down 15%, on volume of 5.3 million, according to Nasdaq.com. The move extends a year-to-date decline of 17% for the shares based on Tuesday's regular session close at $31.17. The stock is down more than 40% since hitting a 52-week high of $45.01 on March 8. The quarterly miss breaks a streak of at least eight quarters of upside surprises for Juniper, which said it now sees a non-GAAP profit of 26 to 30 cents a share in its fiscal third quarter on revenue of $1.07 billion to $1.12 billion. That view compares to Wall Street's current consensus estimate for earnings of 38 cents a share in the September quarter on revenue of $1.22 billion. The news was weighing on a number of other networkers in after-hours action, including Cisco Systems ( CSCO), off 1.6% to $16.03 on volume of more than 880,000; Ciena ( CIEN), losing 5% to $16.70 on volume of 440,000; Limelight Networks ( LLNW), down 3% to $4.84 on volume of less than 30,000; and Aruba Networks ( ARUN), dipping 2.6% to $24 on volume of around 20,000.