Highest net debt in billions among #stocks $SPX $SPY 1.  FREDDIE MAC $FMCKJ: 2302.89 2.  ATandT INC. $T: 154.31 3.  FORD MOTOR COMPANY $F: 120.96 4.  VERIZON COMMUNICATIO. $VZ: 110.69 5.  COMCAST CORPORATION $CMCSA: 95.06 United States United States United States United States United States