PG&E Corp (NYSE:PCG), the gas and electric group, was the major riser in pre-market US deals.
The stock climbed over 38% to $24.50 after the shares have lost 50% this week amid the California wildfire controversy.
The shares rose after hours after a state regulator said he had no interest in seeing the utility company declare bankruptcy.
The stock has been plunging on investor worries of massive liabilities if it is found responsible for the Camp Fire, the deadliest and most destructive wildfire in California history
An investigation is underway, and will likely last months.
In other news, the tech sector's share slide is in focus, with computer chip maker Nvidia Corp (NASDAQ:NVDA), the main culprit.
Shares tanked 17.7% in extended hours to $166.70 after its third-quarter numbers missed on revenue and forward guidance.
Revenue for the three months came in at $3.18 billion, against $3.24 billion expected by analysts, while for the fourth quarter, Nvidia said it was expecting $2.70 billion in revenue, plus or minus 2%, excluding certain items. But the consensus was for $3.40 billion.
Nvidia, like most other tech firms took a beating last month - the worst month for the Nasdaq index since the meltdown of 2008.
Elsewhere, in a similar vein, Applied Materials Inc (NASDAQ:AMAT) saw shares lose over 9% before the New York bell at $31.73
The company provides services and software to enable the manufacture of semiconductor chips.
It came as the group met Wall Street earnings expectations but issued weaker-than-expected guidance.
Adjusted earnings were $0.97 cents a share, while revenue rose to $4.01 billion from $3.99 billion a year ago.
Analysts had estimated adjusted earnings of $0.97 per share on revenue of $4 billion.
Last but not least, Viacom Inc (NASDAQ:VIA), the media giant, had shares up nearly 3% to $36.14 in pre-market deals as its fourth-quarter earnings surpassed expectations.
Adjusted EPS (earnings per share) for the three months was $0.99, beating consensus of $0.96. Revenue for the three months was $3.485 billion, beating consensus of $3.374 billion, and up 5% from $3.319 billion one year ago.