Abe Spurs Day Traders as Japan Stock Swings Hit 2-Year High

"Day trading helps explain why Japanese individuals now account for more than 40 percent of the nation’s equity volume, or about as much as the overseas institutions that once were the biggest traders. They’ve also helped make Japan the most volatile developed market, which is good for some and bad for others. (...) Dramatic price movements aren’t the only thing that’s made Japan a day trader’s paradise. Deregulation of margin tradingopened the flood gates, Murakami said. After rules were relaxed in January, investors can borrow three times as much as their brokerage account balances and turn loans over the instant they exit a trading position."

http://www.bloomberg.com/news/2013-06-23/abe-spurs-day-traders-as-japan-stock-volatility-hits-2-year-high.html