

The consumer price index (CPI) rose 0.4% on a monthly basis and was up 2.9% from a year ago in December. (Justin Sullivan/Getty Images / Getty Images) The report showed that inflationary pressures in the U.S. economy continue to persist despite progress in bringing inflation closer to the Federal Reserve's 2% target over the past year. High inflation has created severe financial pressures for most U.S. households, which are forced to pay more for everyday necessities like food and rent. Price hikes are particularly difficult for lower-income Americans, because they tend to spend more of their already-stretched paycheck on necessities and have less flexibility to save money. Energy costs accounted for over 40% of the monthly CPI increase, with the Bureau of Labor Statistics' energy index rising 2.6% in December after energy prices showed little change in recent months. Gasoline prices were up 4.4% for the month of December.