The roller-coaster ride continued this week on Wall Street.
The Dow Jones Industrial Average fell nearly six percent to close at 25,501.60.
This basket of 30 large-cap stocks is down by more than 13 percent from its high of 29,423 on February 13.
The biggest loser today among the Dow stocks was Apple. Its shares plunged 5.6 percent following disappointing earnings results reported after markets closed on October 29.
Today, one Apple share was worth US$108.86 at the closing bell.
Another big loser was Tesla, which fell 5.55 percent on NASDAQ to close at US$388.04.
The market value of both companies has fallen sharply since their shares split on August 31.
On that day when Tesla stock split on a 5:1 basis, the shares opened at US$444.61. Since then, they've declined by 12.7 percent.
Apple shares fell even farther—14.7 percent—since its shares split 4:1 on August 31. Today alone, Apple lost US$111 billion in market value.