{"id":75200,"date":"2021-02-08T10:40:30","date_gmt":"2021-02-08T15:40:30","guid":{"rendered":"https:\/\/ibkrcampus.com\/?p=75200"},"modified":"2024-05-15T10:29:46","modified_gmt":"2024-05-15T14:29:46","slug":"do-floor-traders-matter","status":"publish","type":"post","link":"https:\/\/www.interactivebrokers.com\/campus\/ibkr-quant-news\/do-floor-traders-matter\/","title":{"rendered":"Do Floor Traders Matter?"},"content":{"rendered":"\n<p><em>The article was first posted on <a href=\"https:\/\/quantpedia.com\/do-floor-traders-matter\/\">Quantpedia<\/a>. The below is an excerpt<\/em>.<\/p>\n\n\n\n<p><a href=\"https:\/\/quantpedia.com\/coronavirus-financial-markets\/\" target=\"_blank\" rel=\"noreferrer noopener\">The pandemic of COVID-19<\/a>&nbsp;brought many changes for the whole humanity. The financial markets were no exception, but the trading has continued. Nowadays, the order can be placed from anywhere around the world and almost all stock exchanges are electronic and algorithmic. However, there still is one exchange where the floor trading exists \u2013 NYSE. During these tough times, NYSE was also purely electronic, the floor trading was closed, and human interaction was not possible. A novel study by Brogaard, Ringgenberg and Roesch examines the role of floor traders in the recent era driven by computers. The conclusion is clear: in the current digital age, floor traders still matter.&nbsp;<\/p>\n\n\n\n<p><strong>Authors:<\/strong>&nbsp;Jonathan Brogaard, Matthew C. Ringgenberg, Dominik Roesch<\/p>\n\n\n\n<p><strong>Title:&nbsp;<\/strong>Does Floor Trading Matter?<\/p>\n\n\n\n<p><strong>Link<\/strong>:&nbsp;<a href=\"https:\/\/papers.ssrn.com\/sol3\/papers.cfm?abstract_id=3609007\">https:\/\/papers.ssrn.com\/sol3\/papers.cfm?abstract_id=3609007<\/a><\/p>\n\n\n\n<p><strong>Abstract:<\/strong><\/p>\n\n\n\n<p>While algorithmic trading now dominates financial markets, some exchanges continue to use human floor traders. On March 23, 2020 the NYSE suspended floor trading because of COVID-19. Using a difference-in-differences analysis, we find that floor traders are important contributors to market quality, even in the age of algorithmic trading. The suspension of floor trading leads to higher effective spreads, volatility, and pricing errors. Moreover, consistent with theoretical predictions about automation, the effects are strongest during the opening and closing auctions when complexity is highest. Our findings suggest that human floor traders improve market quality.<\/p>\n\n\n\n<p>If floor traders are not present, spreads between stocks listed on NYSE and another exchange are widening. As always, the information is the best absorbed visually (for proportional effective spreads):<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1012\" height=\"437\" data-src=\"\/campus\/wp-content\/uploads\/sites\/2\/2021\/02\/Speads-quantpedia.png\" alt=\"Do Floor Traders Matter?\" class=\"wp-image-75223 lazyload\" data-srcset=\"https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/02\/Speads-quantpedia.png 1012w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/02\/Speads-quantpedia-700x302.png 700w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/02\/Speads-quantpedia-300x130.png 300w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/02\/Speads-quantpedia-768x332.png 768w\" data-sizes=\"(max-width: 1012px) 100vw, 1012px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1012px; aspect-ratio: 1012\/437;\" \/><\/figure>\n\n\n\n<p>\u201cThis figure shows proportional effective spreads (PESPR) in per cent for all matched NYSE and Nasdaq listed stocks in our sample. We calculate changes in PESPR since January, 1st 2020 per stock-day and plot the daily marketcap-weighted average PESPR across all stocks in our sample. The first vertical line (2020-03-18) indicates the announcement of the event, the closing of the NYSE floor. The second vertical line (2020-03-23) indicates the event day. Data is from CRSP and TAQ.\u201d<\/p>\n\n\n\n<p><em>Visit Quantpedia to read the full article: <a href=\"https:\/\/quantpedia.com\/do-floor-traders-matter\/\">https:\/\/quantpedia.com\/do-floor-traders-matter\/<\/a>.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>This article reviews a paper on trading automation and human floor traders seem to improve market quality.<\/p>\n","protected":false},"author":186,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[339,338,341,351,344],"tags":[851,1006,494],"contributors-categories":[13662],"class_list":{"0":"post-75200","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-data-science","7":"category-ibkr-quant-news","8":"category-quant-development","9":"category-quant-europe","10":"category-quant-regions","11":"tag-algo-trading","12":"tag-fintech","13":"tag-quant","14":"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 Yoast SEO Premium plugin v26.9 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Do Floor Traders Matter? | IBKR Quant<\/title>\n<meta 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