She lose all her money in stock exchange speculation.

她将所有的钱赔进了股票投机生意。

youdao

High oil prices have allowed state and private investors across the Gulf to funnel billions of dollars into property markets, infrastructure projects and, more recently, foreign-exchange speculation.

高涨的油价使得海湾各国的国有和私人投资者能将上百亿美元资金投入房地产市场、基础设施项目，不久前更是投入了外汇投机交易。

youdao

But the activity of property speculation and the sale of dwellings are just as unproductive and incapable of creating wealth as any other exchange of commodities.

但是倒卖产权以及房产销售同其他日用品交易一样既无甚收益也不能够创造财富。

youdao

" He called foreign-exchange speculation "unnecessary, unproductive and immoral.

CNN: A QUESTION OF OPENNESS

Coal is my best example because unlike copper it trades on no exchange, impervious to financial speculation and manipulation.

FORBES: Magazine Article

Or to put it another way, the vast majority of foreign exchange trading was supporting market speculation, not genuine wealth-creating activity by businesses.

BBC: How scary is a financial transactions tax?