This is especially true for larger accounts where entry and exit of positions has heavy cost because the orders are large enough to move the markets.

这一点对于大资金帐户进出市场非常重要，因为它们的买卖金额太大了以致于引起市场的波动。

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However, airlines usually receive substantial discounts of as much as 50% from manufacturers for large orders, especially in the case of newly launched aircraft, say analysts.

WSJ: Boeing Gets Orders for Stretched Dreamliner