Stock markets across Asia plunged on Monday, following big falls last week by major indexes around the world. In Japan, the Nikkei 225 index fell by 12.4%, or 4,451 points - its largest points drop in history, while the broader Topix index lost 12.2%. It comes after weak jobs data in the US on Friday sparked concerns about weakness in the world's largest economy. A stronger yen makes Japanese goods more expensive, and consequently less attractive to potential overseas buyers. India's main index, the NSE Nifty 50, was trading 2.8% lower and the S&P/ASX 200 in Australia was down about 3.6%. The Hang Seng in Hong Kong was down 2.5%, while the Shanghai Stock Exchange was 1.4% lower.