{"id":67986,"date":"2020-12-02T11:10:35","date_gmt":"2020-12-02T16:10:35","guid":{"rendered":"https:\/\/ibkrcampus.com\/?p=67986"},"modified":"2024-05-15T10:29:55","modified_gmt":"2024-05-15T14:29:55","slug":"novel-market-structure-insights-from-intraday-data","status":"publish","type":"post","link":"https:\/\/www.interactivebrokers.com\/campus\/ibkr-quant-news\/novel-market-structure-insights-from-intraday-data\/","title":{"rendered":"Novel Market Structure Insights From Intraday Data"},"content":{"rendered":"\n<p>In recent years, financial markets have experienced a boom in passive and&nbsp;<a href=\"https:\/\/quantpedia.com\/screener\/?FilterTitle=index\" target=\"_blank\" rel=\"noreferrer noopener\">index-based strategies<\/a>, which could have caused a change in the trading volume, volatility, beta or correlations. The reason is straightforward: the index investing causes a lot of stocks to move in the same direction. A novel research Shen&nbsp;and Shi (2020), using high-frequency data, suggests that over the last two decades, the patterns mentioned above have changed and the index investing is the cause. Both the trading volume and stock correlations are increased at the end of trading sessions. Betas are firstly dispersed, but in general, converge to one during the rest of the day. Trading volume has high dispersion at the market open,&nbsp;but low dispersion at the market close. Overall, the paper has many important implications for portfolio managers, risk managers and traders as well since it is closely related to the transaction costs, intraday price fluctuations, correlations or liquidity. Moreover, it is full of exciting charts that are worth seeing.<\/p>\n\n\n\n<p><strong>Authors:<\/strong>&nbsp;Yiwen Shen and Meiqi Shi<\/p>\n\n\n\n<p><strong>Title:&nbsp;<\/strong>Index-based Investing and Intraday Stock Dynamics<\/p>\n\n\n\n<p><strong>Link<\/strong>:&nbsp;<a href=\"https:\/\/papers.ssrn.com\/sol3\/papers.cfm?abstract_id=3696124\">https:\/\/papers.ssrn.com\/sol3\/papers.cfm?abstract_id=3696124<\/a><\/p>\n\n\n\n<p><strong>Abstract:<\/strong><\/p>\n\n\n\n<p>We investigate how the growth of index-based investing impacts the intraday stock dynamics using a large high-frequency dataset, which consists of 1-second level trade data for all S&amp;P 500 constituents from 2004 to 2018. We estimate intraday trading volume, volatility, correlation, and beta using estimators that are statistically efficient under market microstructure noise and observation asynchronicity. We find the intraday patterns indeed change substantially over time. For example, in the recent decade, the trading volume and correlation significantly increase at the end of trading session; the betas of different stocks start dispersed in the morning, but generally move towards one during the day. Besides, the daily dispersion in trading volume is high at the market open and low near the market close. These intraday patterns demonstrate the implication of the growth of index-based strategies and the active-open, passive-close intraday trading profile. We theoretically support our interpretation via a market impact model with time-varying liquidity provision from both single-stock and index-fund investors.<\/p>\n\n\n\n<p>As always, the results can be presented through interesting charts:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"534\" data-src=\"\/campus\/wp-content\/uploads\/sites\/2\/2020\/12\/quantpedia-novel-data.png\" alt=\"\" class=\"wp-image-67993 lazyload\" data-srcset=\"https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2020\/12\/quantpedia-novel-data.png 1024w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2020\/12\/quantpedia-novel-data-700x365.png 700w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2020\/12\/quantpedia-novel-data-300x156.png 300w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2020\/12\/quantpedia-novel-data-768x401.png 768w\" data-sizes=\"(max-width: 1024px) 100vw, 1024px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1024px; aspect-ratio: 1024\/534;\" \/><\/figure>\n\n\n\n<p>Visit Quantpedia to read Notable quotations from the academic research paper: <br><a href=\"https:\/\/quantpedia.com\/novel-market-structure-insights-from-intraday-data\/\">https:\/\/quantpedia.com\/novel-market-structure-insights-from-intraday-data\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Quantpedia reviews a novel financial research paper by Shen and Shi (2020), using high-frequency data.<\/p>\n","protected":false},"author":186,"featured_media":50156,"comment_status":"closed","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[339,338,341,351,344],"tags":[420,1988,8485,806,6496,8832,494,860],"contributors-categories":[13662],"class_list":{"0":"post-67986","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-data-science","8":"category-ibkr-quant-news","9":"category-quant-development","10":"category-quant-europe","11":"category-quant-regions","12":"tag-beta","13":"tag-correlation","14":"tag-data-mining","15":"tag-data-science","16":"tag-high-frequency-trading","17":"tag-intraday-trading-volume","18":"tag-quant","19":"tag-volatility","20":"contributors-categories-quantpedia"},"pp_statuses_selecting_workflow":false,"pp_workflow_action":"current","pp_status_selection":"publish","acf":[],"yoast_head":"<!-- This site is optimized with the 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