12月31日沪深两市平淡开盘后走低，尾盘护盘失败，沪指再度跳水跌幅近1%。

截至收盘，沪指收报3539.18点，跌33.70点，跌0.94%；深指报12664.89点，跌224.95点，跌1.75%；创业板报2714.05点，跌65.47点，跌2.36%。行业板块全面收跌，两市共成交6865.97亿元。

东方财富网数据显示，12月31日共有15只A股换手率超过20%，其中中坚科技换手率最高，达73.74%。

两市换手率前50个股

序号证券简称收盘价(元)换手率(%)涨跌幅(%)振幅(%)1中坚科技78.273.747.3616.642博敏电子51.2872.215.6915.173邦宝益智92.4270.9010.005.674安记食品55.3763.72-8.849.15道森股份53.9349.89-10.007.616读者传媒58.847.1410.011.57凯龙股份127.844.63-10.007.138青海明胶18.4640.1910.017.699华铭智能40.4527.963.085.2510韩建河山40.9627.860.545.611康耐特24.9926.71-6.336.3712海伦钢琴27.4823.34-7.798.7213汇金股份56.7222.060.4211.4214雪峰科技33.7421.95-6.108.4915石大胜华42.2520.54-1.817.6216永创智能37.4219.55-5.846.3717山东路桥8.9719.422.878.1418唐德影视8219.33-7.4710.219弘高创意30.219.066.346.0620中电电机58.6119.05-0.696.2721索菱股份49.5518.86-3.9410.6622林海股份14.1918.776.1315.7823电光科技49.1418.434.7812.0324新宙邦58.518.400.869.7125众和股份21.8418.23-10.0110.4726雄韬股份30.6117.76-5.795.7627首钢股份4.0817.219.9710.2428赛摩电气65.5317.18-5.289.529冠福股份14.8817.129.989.4630德联集团13.317.04-7.646.8131亿通科技29.1116.68-9.6014.6632三圣特材44.9215.93-2.675.733日上集团36.6915.897.005.5434三五互联26.515.67-2.007.7335大康牧业8.4915.415.606.2236招商蛇口20.8614.75-10.016.3837易尚展示107.414.60-8.879.7638长方照明10.7414.504.2710.7839赣锋锂业62.9314.49-0.447.3140博汇纸业4.5214.45-3.427.9141诺力股份38.9414.38-2.368.7542东风科技22.4614.20-3.1511.6443濮阳惠成5614.09-5.646.4744奋达科技43.713.892.1311.6445浩丰科技19113.79-9.009.9846高鸿股份15.6313.740.198.0847双杰电气32.7813.69-5.947.2948太极股份67.113.602.4115.3749襄阳轴承12.4113.5110.027.2750柘中股份19.5713.380.576.63

数据来源：东方财富Choice数据