They thus provide farmers and traders with an important defence or "hedge" against price risks.
因此，这类合同为农民和贸易商提供了应对价格风险的重要防卫或保护。
2
In such deals, traders sell borrowed shares, hoping they can buy them back later at a cheaper price.
在这类交易中，交易员将会卖出借来的股票，希望随后会以更低的价格将其买回。
3
As expected, the availability of price information increased the level of competition between the traders, raising prices and reducing the variation in prices between nearby mandis.