UnitedHealth posted a better-than-expected fourth-quarter profit, but a nagging rise in medical costs and care utilization surprised Wall Street.

BP warned that its fourth-quarter results will be hit by weaker oil and gas production, refining margins and trading, while also delaying a highly-anticipated investor day due to a medical procedure undergone by CEO Murray Auchincloss.

Wells Fargo reported earnings per share of $1.43 for the fourth quarter, beating Wall Street’s consensus estimate of $1.35. A year earlier, the bank reported profit of 86 cents a share. Net interest income,

BP is warning of weak fourth-quarter profits as a result of weaker production, refining margins and trading. The London-based energy giant, whose largest refinery worldwide is the BP Whiting Refinery on Lake Michigan,

BP expects lower production in the upstream segment in the fourth quarter (Q4) compared with Q3, affecting both oil production and operations and gas and low-carbon energy.