U.S. telcos are having a rough day. A general selloff in high-yield stocks could be a factor, but not all of the decliners pay huge dividends (if any). VZ -2.9%. WIN -2.7%. CTL -2.4%. CBB -2.5%. CBEY -4.7%. TWTC -2.1%. TDS -2.6%. SHEN -7.4%. Volatile Latin American carrier NII Holdings (NIHD -7.2%) is also selling off.