正如(ru)本欄昨(zuo)日(ri)分(fen)析那樣，10月合(he)(he)(he)約正式成為(wei)主(zhu)(zhu)(zhu)力(li)合(he)(he)(he)約的(de)第(di)(di)一個交易(yi)日(ri)，多(duo)(duo)(duo)(duo)(duo)空(kong)(kong)(kong)(kong)主(zhu)(zhu)(zhu)力(li)就展開了激烈廝殺(sha)。昨(zuo)日(ri)大(da)(da)盤突然又(you)單(dan)邊(bian)下跌，滬深300指數(shu)最后大(da)(da)跌1.91%。期(qi)指跌幅(fu)略(lve)大(da)(da)，其中(zhong)主(zhu)(zhu)(zhu)力(li)合(he)(he)(he)約跌幅(fu)為(wei)2.07%，升水幅(fu)度(du)收縮至10.28點(dian)；持(chi)倉(cang)(cang)量減(jian)(jian)(jian)(jian)少(shao)2663手(shou)(shou)至130900手(shou)(shou)。從主(zhu)(zhu)(zhu)力(li)席位持(chi)倉(cang)(cang)變化情況看，多(duo)(duo)(duo)(duo)(duo)頭(tou)(tou)主(zhu)(zhu)(zhu)力(li)紛(fen)紛(fen)大(da)(da)幅(fu)減(jian)(jian)(jian)(jian)倉(cang)(cang)，其中(zhong)多(duo)(duo)(duo)(duo)(duo)頭(tou)(tou)前20合(he)(he)(he)計減(jian)(jian)(jian)(jian)倉(cang)(cang)4308手(shou)(shou)，減(jian)(jian)(jian)(jian)倉(cang)(cang)超過1000手(shou)(shou)的(de)有(you)(you)5家(jia)席位；而空(kong)(kong)(kong)(kong)頭(tou)(tou)主(zhu)(zhu)(zhu)力(li)也有(you)(you)所減(jian)(jian)(jian)(jian)倉(cang)(cang)，其中(zhong)空(kong)(kong)(kong)(kong)頭(tou)(tou)前20合(he)(he)(he)計減(jian)(jian)(jian)(jian)倉(cang)(cang)1209手(shou)(shou)；主(zhu)(zhu)(zhu)力(li)凈(jing)空(kong)(kong)(kong)(kong)持(chi)倉(cang)(cang)大(da)(da)幅(fu)增加(jia)到18108手(shou)(shou)。具(ju)體(ti)席位上，空(kong)(kong)(kong)(kong)軍前兩大(da)(da)主(zhu)(zhu)(zhu)力(li)海(hai)通(tong)期(qi)貨和中(zhong)信期(qi)貨減(jian)(jian)(jian)(jian)倉(cang)(cang)多(duo)(duo)(duo)(duo)(duo)單(dan)均多(duo)(duo)(duo)(duo)(duo)于減(jian)(jian)(jian)(jian)倉(cang)(cang)空(kong)(kong)(kong)(kong)單(dan)，其凈(jing)空(kong)(kong)(kong)(kong)持(chi)倉(cang)(cang)分(fen)別攀高到10732手(shou)(shou)和6512手(shou)(shou)；而多(duo)(duo)(duo)(duo)(duo)頭(tou)(tou)第(di)(di)一主(zhu)(zhu)(zhu)力(li)國泰君安減(jian)(jian)(jian)(jian)倉(cang)(cang)多(duo)(duo)(duo)(duo)(duo)單(dan)1087手(shou)(shou)，多(duo)(duo)(duo)(duo)(duo)于減(jian)(jian)(jian)(jian)倉(cang)(cang)的(de)空(kong)(kong)(kong)(kong)單(dan)234手(shou)(shou)，其凈(jing)多(duo)(duo)(duo)(duo)(duo)持(chi)倉(cang)(cang)下降到2035手(shou)(shou)。綜合(he)(he)(he)來(lai)看，盡管多(duo)(duo)(duo)(duo)(duo)空(kong)(kong)(kong)(kong)主(zhu)(zhu)(zhu)力(li)均在(zai)減(jian)(jian)(jian)(jian)倉(cang)(cang)，但空(kong)(kong)(kong)(kong)頭(tou)(tou)主(zhu)(zhu)(zhu)力(li)的(de)優勢(shi)在(zai)進一步擴大(da)(da)，不利(li)于多(duo)(duo)(duo)(duo)(duo)頭(tou)(tou)主(zhu)(zhu)(zhu)力(li)組(zu)織(zhi)反攻。