In the fourth quarter, Ally's auto loan and lease originations jumped 11 percent to $9.1 billion. Auto finance pretax income fell 4.4 percent to $285 million, while automotive insurance pretax income increased 16 percent to $80 million.
In 2018, Ally plans to continue to lend across the credit spectrum, Halmy said. "We plan to remain constructive with the dealers as a full-spectrum lender in the market. That's unlike a lot of banks, [which] sometimes pull back on credit," Halmy said. "Our mantra is to continue to be the leader in the industry."