Tellabs's (TLAB) poor Q4 results pushed the stock under its 52-week low of $5.89/share. Morgan...

|By:, SA News Editor

Tellabs's (TLAB) poor Q4 results pushed the stock under its 52-week low of $5.89/share. Morgan Stanley, which downgraded its shares, noted Tellab's core wireless backhaul business is suffering as carriers like AT&T (T) turn to Ethernet-based gear. TLAB closed -19%.