Stocks have climbed on Wall Street, putting the market on track for its first three-day rally in six weeks.

The rally comes despite the scale of the downturn of the US economy caused by the coronavirus pandemic becoming more apparent.

Nearly 3.3 million Americans applied for unemployment benefits last week, easily shattering the previous record set in 1982, as redundancies and business closures sweep across the country.

The outbreak has happened so suddenly that the latest unemployment report is one of the first points of data showing how much economic pain it is creating.

The S&P 500 was up 4.7% in early trading, continuing a rally that has vaulted the index 15.8% higher since Monday on rising expectations that the US Congress will soon approve an unprecedented rescue package for the economy. Both Capitol Hill and the Federal Reserve are promising an astonishing amount of aid for the economy and markets, hoping to support them as the outbreak causes more businesses to shut down by the day.

Late on Wednesday, the Senate unanimously approved the 2.2 trillion dollar (£1.83 trillion) plan, which includes direct payments to US households and aid to hard-hit industries. The House of Representatives is expected to approve it on Friday.

Futures for stocks and yields cut their losses immediately after the jobless claims report was released in the morning, which was before US stock trading opened. Most traders are likely to have expected an extreme number from the jobless report, according to Kevin Giddis, chief fixed income strategist at Raymond James.

Investors say the market need three main things to slow its breathtaking drop, which has sliced one quarter off the S&P 500 since it set its record last month.

The first is already here after the Federal Reserve has slashed interest rates back to nearly zero and offered to buy an unlimited amount of Treasuries to get lending markets running more smoothly. The second is making progress, as the economic rescue plan moves through Capitol HIll.

The third, though, is getting more concerning by the day: the accelerating spread of the virus.

The United States has more than 69,000 known cases, and the worldwide number of infections has topped 487,000, according to Johns Hopkins University. The death toll has surpassed 22,000, while more than 117,000 have recovered.

For most people, coronavirus causes mild or moderate symptoms, such as a temperature and cough that clear up in two to three weeks. For some, especially older adults and people with existing health problems, it can cause more severe illness, including pneumonia and death.

The yield on the 10-year Treasury fell to 0.81% from 0.85% late on Wednesday. It had been as low as 0.77% just before the unemployment report was released. Lower yields reflect dimmer expectations for economic growth and greater demand for low-risk assets.