根据文中表述现在对伦敦公司正在进行尽调(conducting due diligence to acquire Concord Associates, which is domiciled in London),在收购完成前对冲汇率风险(mitigate the GBP currency risk before closing on the acquisition of Concord),此时不是应该担心美元贬值或英镑升值(要把美元转换成英镑去并购),在并购完成后持有英镑资产后再担心英镑贬值风险,麻烦问下,这两题为何在现阶段担心英镑贬值风险而做对冲(此时英镑贬值不正好能兑换更多英镑去并购而有利)?