下列各项指标中，（ ）可以反映资产收益率的波动性。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='26423' and id < 2207720 and id<>'2207720' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26423' and id > 2207720 and id<>'2207720' order by id asc limit 5