Shares fall after tech firm reports loss
Stock markets across the world are struggling as companies around the world report record losses.
Some of the worst losses have been in China, where shares fell almost 4 percent on Tuesday.
A major U.S. retailer, Target, reported a $5 billion loss.
It said the company lost more than $2 billion in the third quarter.
The worst day for the markets so far was Friday, when the S&P 500 index was down 4.7 percent.