The BDI - though a useful early-warning index - is highly volatile and exaggerates apparent ups and downs in trade.

BDI——虽然作为早期警报指数有用——总是具有不稳定性和夸大性，随交易其升降很大。

youdao

The index is based on the idea of purchasing-power parity (PPP), which says currencies should trade at the rate that makes the price of goods the same in each country.

指数在购买力平价（PPP）这一概念基础上产生，购买力平价是指货币应以使商品价格在各个国家保持一致的汇率兑换。

youdao

The firm started to sell $4.1 billion of “E-Mini” futures contracts based on the S&P 500 index through an algorithmic trade, taking account only of volume, not time or price.

该公司开始卖出价值为41亿美元的“电子迷你”期货合约，这些合约以一种算法交易形式建立在标准普尔500指数之上，只考虑交易量而不考虑时间和价格因素。

youdao

Why trade index options at the Merc versus the CBOE?

FORBES: Money & Investing

However, the current trade weighted index (TWI) has the majors undervalued by -8% when compared to the mean of the last three decades.

FORBES: EURO Temporarily Rooted But For How Long?

Last week, the market noted that the current trade weighted index (TWI) has the majors undervalued by -8% when compared to the mean of the last three decades.

FORBES: Move up http://i.forbesimg.com t Move down