推荐回答（2个）
(1)判断:将三个市场转换成同一标价,这里法兰克福为直接标价,其他为间接标价,可以统一转换成间接标价:
纽约外汇市场：USD1=DEM1.9100-1.9110
法兰克福市场：DEM1=GBP1/3.7800-1/3.7790
伦敦外汇市场：GBP1=USD2.0040-2.0050
汇率相乘(用中间价):
[(1.91+1.911)/2]*[(1/3.7800+1/3.7790)/2]*[(2.0040+2.0050)/2]=1.013,不等于1,有套汇机会.
(2)如何套汇与套汇收益:因为汇率相乘大于1,持美元者可在纽约换成马克，再到法兰克福将马克换成英镑，最后到伦敦将英镑换成美元,赚取美元,单位美元套汇收益:
1.9100*1/3.7800*2.0040-1=0.0126美元
(3)如果用英镑套汇:可以伦敦市场兑换成美元,再在纽约兑换成马克,再在法兰克福兑换英镑,单位英镑套汇:
1.9100*1/3.7800*2.0040-1=0.0126英镑
由此可见,只要在套汇的机会,单位某货币的套汇获利数量是一样的(当然货币单位不同)
有机会
持usd在纽约换成dem，再到法兰克福将dem换成gbp，最后到伦敦将gbp换成usd
赚取美元
比如usd1000→买入dem1000*1.9100=1910
将dem1910→买入gbp1910/3.7800=505.2910
最后gbp505.2910→买入美元505.2910*2.0040=1012.603
赚取usb1012.63-1000=12.63
现实中没这么简单啦
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