Trade wars are hurting commodity prices, so the resource stocks to watch for next week include:Petrobras $PBR is effectively a state-held asset: $PBR, Petroleo Brasileiro S.A.- Petrobras / H1 $VALE is falling as the base metals decline: $VALE, VALE S.A. / H1 Nat gas output in the U.S. over the next 20 years is said to (from an analyst today) to increase: $CHK, Chesapeake Energy Corporation / H1 Deep-sea drillers will struggle more than energy stocks. Watch Ensco:$ESV: $VAL, Valaris plc / H1