对冲基金可以起到稳定市场的作用。他们可以通过增加市场的流动性以及对市场的价格的双向变化都进行下注的方式来实现市场的稳定。
Hedge funds may have acted to stabilise markets by increasing liquidity and by betting on both falling and rising prices.
股票计算功能：用户只需输入买入价格，系统为您除去佣金印花税(双向)计算真实利润。
Stock calculation: Users only need to enter the buying price, you remove the commission system for stamp duty (two-way) calculation of real profit.
结果表明：中国和美国棉花期货价格存在双向引导和长期均衡关系；
The results showed that there were bi-directional relation and long-run equilibrium relationship.
解除放空价格限制前后现货与期货都存在双向的波动性外溢，但现货之领先地位增加。
After the limitation on put-option for stock prices is removed, the bidirectionally fluctuation spillover will exist in both stocks and futures; yet, stocks will take stronger leading place.
解除放空价格限制前后现货与期货都存在双向的波动性外溢，但现货之领先地位增加。
After the limitation on put-option for stock prices is removed, the bidirectionally fluctuation spillover will exist in both stocks and futures; yet, stocks will take stronger leading place.
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