The letter to KPMG, Wells Fargo's auditor, may be part of a broader effort by the Massachusetts senator to have a role in choosing accounting regulators in a Clinton administration.
The integrated oil majors should see some upstream segment improvement despite sequentially flat oil prices, as they put negative one-time factors from the second quarter behind them.
Crude oil set its 2016 high a week ago, while Chevron and Exxon Mobil are well below their July highs. Both oil giants report earnings Friday.
The odds were against Wall Street on Thursday after another decline in crude oil sparked an energy selloff and Apple reported a so-so quarter.