But as the market peaked in early June, the government tightened rules on margin trading. Investors then began to sell their holdings to protect their profits.

但随着6月初股市达到顶峰，政府也收紧了保证金交易的规定，投资者开始抛售股票以保护收益。

Higher " margin trading, " in which investors do not have to deposit the full cost of their stock trades in order to buy the shares, also fueled gains.

保证金交易使得投资者无需存入股票交易的全额资金，这也助长了这一势头。