Investors may trade in the Pre-Market (4:00-9:30 a.m. ET) and the After Hours Market (4:00-8:00 p.m. ET). Participation from Market Makers and ECNs is strictly voluntary and as a result, these ...

OKLAHOMA CITY — A rate review case filed at the Oklahoma Corporation Commission by Public Service Company of Oklahoma could result in a hefty bill increase for PSO customers.

Public Service Co. of Oklahoma has sued the Rogers County Commission and the county’s Board of Adjustment after the latter panel rejected a special exception request by PSO that the county required to ...