AT&T

(T) - Get Report

was up 3% in midmorning after announcing that its broadband unit will trade cable TV systems in four states for two cable systems in Florida owned by

Charter Communications

(CHTR) - Get Report

TST Recommends

.

The companies said the deal is worth $1.79 billion and will boost Charter's total customer base by 512,000. Charter was down 0.6%.

On Tuesday, AT&T Broadband sold several cable systems to

Mediacom Communications

(MCCC)

.