Calix's Q4 warning, which has come in the wake of warnings (I, II) from fellow telecom equipment suppliers Cyan (CYNI -2.4%) and Procera (PKT -2.6%), has sparked a general selloff in telecom equipment and component/chip names. A Deutsche downgrade of Alcatel-Lucent, one of the best-performing names in the space in 2013, could also be playing a role.
Calix, Cyan, and Procera all have considerable exposure to U.S. carriers not named AT&T or Verizon. While Calix didn't mention which region(s) are responsible for its warning, Cyan blamed an 88% Q/Q drop in sales to U.S. telco/top customer Windstream, and Procera blamed soft demand from U.S. cable providers.
The group sold off a month ago after Cisco cut its long-term growth outlook.