We're adding to an oil stock and see 3 other names as good buys in a down market

Markets are once again in selloff mode Friday.

We're adding to an oil stock and see 3 other names as good buys in a down market

A Halliburton oil well fielder works on a well head at a fracking rig site January 27, 2016 near Stillwater, Oklahoma.

J. Pat Carter | Getty Images