投资者利用金融期货进行套期保值时，必须考虑的因素有（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25449' and id < 2143427 and id<>'2143427' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25449' and id > 2143427 and id<>'2143427' order by id asc limit 5