Oil-rig count rises for 19th straight week

The US oil-rig count rose by two to 722 last week, according to oilfields-services company Baker Hughes. 
This week marks the one-year anniversary of when the tally bottomed after the price downturn. The stunning drop in the number of rigs was a proxy for how hard lower prices were hurting exploration companies. 
With 19 straight weeks of rig additions and oil near $50 a barrel, producers are clearly more confident in market conditions than they were a year ago.  
The gas-rig