The Dow Jones industrial average has fallen below the 20,000 mark for the first time since March.
The Dow closed down 6.8% Thursday afternoon, its lowest close since March 18.
The Standard & Poors industrial average ended the session with a loss of 3.3%.
The Nasdaq composite index lost 2.1%.
The Dow’s slump has been exacerbated by several issues, such as a sharp decline in oil prices and a drop in corporate earnings.
The decline in the S&P index was fueled by the impact of a series of health care reforms that could increase premiums and limit coverage.
The index has been stuck in a negative territory for the past six months.
The S&P 500 index fell 4.1% Thursday, its largest daily decline in almost a year.
The Nasdaq Composite Index fell 6.7% Thursday to end the session at 8,942.07, down 0.1%, the worst performance for the 10-day moving average since April 16, 2016.
The Standard <poors index was off by 0.7%.
It fell for the sixth straight session.
The S&p 500 closed at a record close on Thursday of 21,928.80.
The Dow is down about 1% each day.
The stock market has had a turbulent year, which has been fueled by a combination of a sharp drop in oil and the health care reform law.
The price of oil dropped more than 20% on Monday, the biggest daily drop since February 2017.
The market is now down about 2% a day.
The Nasdemic is up about 1%.
The market is expected to remain volatile throughout the year.
There are plenty of factors that could cause the Dow to continue to drop, but it is likely to decline for the foreseeable future.