







摘 要:通過(guò)分析2009年至今中國(guó)A股三大指數(shù)的定期調(diào)整對(duì)樣本股票的影響,可以發(fā)現(xiàn)從指數(shù)調(diào)整公告日到調(diào)整實(shí)施日的兩周窗口期內(nèi),新納入的成分股相對(duì)于被剔除的股票具有顯著的超額回報(bào),但該現(xiàn)象在指數(shù)調(diào)整正式實(shí)施后出現(xiàn)逆轉(zhuǎn)?;貧w分析證明,被動(dòng)跟蹤基金的提前調(diào)倉(cāng)行為對(duì)以上現(xiàn)象具有一定的解釋能力。實(shí)證回測(cè)發(fā)現(xiàn),構(gòu)建基于被動(dòng)跟蹤資金的套利策略具有高額收益。
關(guān)鍵詞:指數(shù)調(diào)整效應(yīng);被動(dòng)資金;套利策略
中圖分類號(hào):F832.5 文獻(xiàn)標(biāo)志碼:A" " " " " "文章編號(hào):1005-9679(2024)01-00-08
Chinese A-Share Indexes Revision and Arbitrage Strategy Construction: from Evidence of Passive Index Fund Tracking
JIANG Linkai
(Shanghai Advanced Institute of Finance,Shanghai JiaoTong University,Shanghai 200030,China)
Abstract: Main focuses are the return effects of Chinese A-share indexes revisions and arbitrage strategy construction. With the investigation on the short-term effects of index revisions made by China main three A-share indexes on a sample of stocks since 2009,it is of significance to find the rising trend in the return of added stocks compared to deleted firms during the two-week window from the announcement of the index revision to the implementation day through basic statistic method. However,this trend is completely reversed after the revision is implemented. Through further regression,a possible explanation was obtained for this phenomenon from the early portfolio adjustment of passive funds. Results from empirical tests guide us form the trading strategy with high excess return based on the passive funds scale.
Key words:index revision effect;passive indexing;arbitrage strategy
0 引言
市場(chǎng)信息是影響股價(jià)的重要因素。實(shí)證分析表明,中國(guó)A股指數(shù)樣本的調(diào)整可能影響機(jī)構(gòu)和散戶投資者對(duì)公司的信心。在綜合反映中國(guó)A股市場(chǎng)上市股票價(jià)格整體表現(xiàn)的指數(shù)中,由上海證券交易所與中證指數(shù)有限公司發(fā)布的滬深300(CSI300)、中證500(CSI500)和上證50(SSE50)是最具代表性的三大指數(shù),背后存在龐大的被動(dòng)跟蹤資金,可作為投資業(yè)績(jī)的評(píng)價(jià)基準(zhǔn)。兼顧市值規(guī)模和流動(dòng)性,這三大指數(shù)根據(jù)總市值和成交額對(duì)股票進(jìn)行綜合排名,選取排名靠前、具有證券市場(chǎng)影響力的公司股票作為樣本股,科學(xué)構(gòu)建反映A股市場(chǎng)價(jià)格表現(xiàn)的指數(shù)。一般情況下,三大指數(shù)每年進(jìn)行兩次樣本股調(diào)整,成分股調(diào)整公告一般在6月初(或7月)和1月(或12月)發(fā)布,并于兩周后正式實(shí)施。與國(guó)外代表性指數(shù)不同,這三個(gè)指數(shù)具有官方性質(zhì),三個(gè)指數(shù)之間也存在一定的相關(guān)性,因?yàn)楸灰粋€(gè)指數(shù)刪除的股票會(huì)同時(shí)加入其他指數(shù),這也成為我們研究的重點(diǎn)。……