By Bret Kenwell Verizon stock is trading lower after disappointing full-year guidance. Here are the must-know levels now. Investors are in Verizon (VZ) – Get Verizon Communications Inc. Report as a flight-to-safety trade. These investors are typically looking for low volatility and a decent yield while they wait. They likely weren’t expecting Verizon stock to fall 6% today after disappointing quarterly results. That’s particularly after the boost we saw in AT&T (T) – Get AT&T Inc. Report stock after it reported better-than-expected results. As we size up telecom, this group has been part of th…