Energy Pricing Suspicious, Report Says
Federal Energy Regulatory Commission, in preliminary report, says there is evidence that natural gas prices might have been manipulated during California energy crisis of 2000-01, helping to drive up power prices; also says there is evidence of possible manipulation of electricity prices by Enron, Avista and El Paso Electric; begins formal investigations to determine whether they broke federal electricity-trading rules; report contrasts with agency's approach at outset of California crisis two years ago, when it played down possibility of manipulation; report comes closer to endorsing view of many California officials that state's energy crisis resulted at least in part from manipulation of market by energy companies like Enron; if commission endorses findings, it could then increase size of refunds it might order energy companies to pay consumers in California for overcharging (M)