The telecom giant's leverage ratio is about to go in the wrong direction.Verizon (VZ 3.84%) is one of the top dividend stocks in the S&P 500. The telecom giant's payout currently yields more than 6.5%. That puts it among the 10 highest yields in that broad market index, where the average is less than 1.5%. Further, the company recently increased its payout for the 18th straight year. That's the longest current streak in the U.S. telecom sector. A big factor driving Verizon's ability to continue increasing i ...