{"id":228475,"date":"2025-08-06T13:00:00","date_gmt":"2025-08-06T17:00:00","guid":{"rendered":"https:\/\/ibkrcampus.com\/campus\/?p=228475"},"modified":"2025-08-07T04:48:19","modified_gmt":"2025-08-07T08:48:19","slug":"revisiting-whether-bigger-is-better-or-worse-for-earnings","status":"publish","type":"post","link":"https:\/\/www.interactivebrokers.com\/campus\/traders-insight\/securities\/stocks\/revisiting-whether-bigger-is-better-or-worse-for-earnings\/","title":{"rendered":"Revisiting Whether Bigger is Better (or Worse) for Earnings"},"content":{"rendered":"\n<p><a href=\"https:\/\/www.interactivebrokers.com\/campus\/traders-insight\/securities\/stocks\/earnings-season-thus-far\/\">Last week<\/a>, as earnings season was kicking into gear, <a href=\"https:\/\/www.interactivebrokers.com\/campus\/traders-insight\/securities\/stocks\/earnings-season-thus-far\/\">we published an analysis<\/a> of the post-earnings moves of the S&amp;P 500 (SPX) components that had reported from July 1 through July 25<sup>th<\/sup>.&nbsp; Our conclusion at the time was that more highly weighted companies were underperforming, implying a bit more scrutiny was being placed upon the results.&nbsp; That seems to have abated after the solid responses to some megacap earnings last week.<\/p>\n\n\n\n<p>The heavily weighted mega-cap winners were of course Microsoft (MSFT, +3.95% post-earnings, 7.34% index weight), and Meta Platforms (META, +11.25% post-earnings, 3.1% index weight).&nbsp; Those more than offset the losses from Apple (AAPL, -2.50% post-earnings, 5.67% index weight) and Amazon (AMZN, -8.27% post-earnings, 3.78% index weight). &nbsp;<\/p>\n\n\n\n<p>One thing that fascinated me while entering the data was just how large the most heavily weighted companies are vis-\u00e0-vis the vast majority.&nbsp; This scatterplot of SPX weights is one way to visualize it.&nbsp; Note how the vast mass of dots is just above the zero line on the y-axis:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1100\" height=\"485\" data-src=\"https:\/\/www.interactivebrokers.com\/campus\/wp-content\/uploads\/sites\/2\/2025\/08\/Picture1-5-1100x485.png\" alt=\"Index weights of SPX stocks by reporting date\" class=\"wp-image-228477 lazyload\" data-srcset=\"https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2025\/08\/Picture1-5-1100x485.png 1100w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2025\/08\/Picture1-5-700x309.png 700w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2025\/08\/Picture1-5-300x132.png 300w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2025\/08\/Picture1-5-768x339.png 768w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2025\/08\/Picture1-5.png 1311w\" data-sizes=\"(max-width: 1100px) 100vw, 1100px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1100px; aspect-ratio: 1100\/485;\" \/><\/figure>\n\n\n\n<p><em>Sources: Interactive Brokers, Bloomberg<\/em><\/p>\n\n\n\n<p>Overall though, we see that some things have changed since the prior week.&nbsp; We had 150 companies reporting in that sample; now we have 327 through Monday.&nbsp; That\u2019s about 65% of the number of stocks in the index (there are actually 503, not 500, thanks to two classes each of Alphabet, Fox, and Newscorp) and about 69% of the current index weight.&nbsp; Unlike before, when a 56.33% majority of post-earnings moves were higher, that is now a slight 48.62% minority.&nbsp; Also unlike before, we see a slight improvement when we adjust the average post-earnings move by index weight.&nbsp; The weighted average is now higher than the average move.&nbsp;<\/p>\n\n\n\n<p>Bottom line, earnings season is going decently, and while we would like to assert that there is a strong relationship between the size of the reporting company and its post-earnings results, we can\u2019t.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"745\" height=\"398\" data-src=\"https:\/\/www.interactivebrokers.com\/campus\/wp-content\/uploads\/sites\/2\/2025\/08\/Picture2-3.png\" alt=\"earnings season is going decently, and while we would like to assert that there is a strong relationship between the size of the reporting company and its post-earnings results, we can\u2019t.\" class=\"wp-image-228479 lazyload\" data-srcset=\"https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2025\/08\/Picture2-3.png 745w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2025\/08\/Picture2-3-700x374.png 700w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2025\/08\/Picture2-3-300x160.png 300w\" data-sizes=\"(max-width: 745px) 100vw, 745px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 745px; aspect-ratio: 745\/398;\" \/><\/figure>\n\n\n\n<p><em>Sources: Interactive Brokers, Bloomberg<\/em><\/p>\n\n\n\n<p><a href=\"https:\/\/www.interactivebrokers.com\/campus\/traders-insight\/securities\/stocks\/earnings-season-thus-far\/\">From the data we published through July 25<\/a>:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"841\" height=\"203\" data-src=\"https:\/\/www.interactivebrokers.com\/campus\/wp-content\/uploads\/sites\/2\/2025\/08\/Picture3-3.png\" alt=\"From the data we published through July 25:\" class=\"wp-image-228480 lazyload\" data-srcset=\"https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2025\/08\/Picture3-3.png 841w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2025\/08\/Picture3-3-700x169.png 700w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2025\/08\/Picture3-3-300x72.png 300w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2025\/08\/Picture3-3-768x185.png 768w\" data-sizes=\"(max-width: 841px) 100vw, 841px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 841px; aspect-ratio: 841\/203;\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Last week, as earnings season was kicking into gear, we published an analysis of the post-earnings moves of the S&amp;P 500 (SPX) components that had reported from July 1 through July 25th.  Our conclusion at the time was that more highly weighted companies were underperforming, implying a bit more scrutiny was being placed upon the results.  That seems to have abated after the solid responses to some megacap earnings last week.<\/p>\n","protected":false},"author":4,"featured_media":198434,"comment_status":"open","ping_status":"closed","sticky":true,"template":"","format":"standard","meta":{"_acf_changed":true,"footnotes":""},"categories":[14700,6,8,9,22,26,3],"tags":[2397,20422,1854,12102,1751],"contributors-categories":[13576],"class_list":{"0":"post-228475","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-ibkr-market-insights","8":"category-north-america","9":"category-region","10":"category-securities","11":"category-stocks","12":"category-text-articles","13":"category-traders-insight","14":"tag-earnings-season","15":"tag-index-weighting","16":"tag-large-caps","17":"tag-market-reaction","18":"tag-small-caps","19":"contributors-categories-interactive-brokers"},"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>Revisiting Whether Bigger is Better (or Worse) for Earnings<\/title>\n<meta name=\"description\" content=\"Last week, as earnings season was kicking into gear, we published an analysis of the post-earnings moves of the S&amp;P 500 (SPX) components that had...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.interactivebrokers.com\/campus\/wp-json\/wp\/v2\/posts\/228475\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Revisiting Whether Bigger is Better (or Worse) for Earnings | IBKR Campus US\" \/>\n<meta property=\"og:description\" content=\"Last week, as earnings season was kicking into gear, we published an analysis of the post-earnings moves of the S&amp;P 500 (SPX) components that had reported from July 1 through July 25th. 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He has held numerous roles in the organization since joining Timber Hill, IBKR\u2019s predecessor, in 1995 as Equity Risk Manager and an options market maker. He developed and implemented automated trading strategies for stocks and options before moving into his current role. Steve has guest authored several columns in Barron\u2019s and made numerous live on Bloomberg TV and Radio, CNBC, Yahoo Finance, Fox Business, and several other media outlets several media outlets in North America, Asia, Australia, and the Middle East in addition to being quoted frequently in print and electronic media. Prior to joining Interactive Brokers, Sosnick held senior trading roles at Morgan Stanley, Lehman Brothers, and Salomon Brothers, where he completed the firm\u2019s famed training program.","sameAs":["https:\/\/ibkr.com"],"url":"https:\/\/www.interactivebrokers.com\/campus\/author\/steve-sosnick\/"}]}},"jetpack_featured_media_url":"https:\/\/www.interactivebrokers.com\/campus\/wp-content\/uploads\/sites\/2\/2023\/10\/markets-outlook-featured-img.jpg","_links":{"self":[{"href":"https:\/\/ibkrcampus.com\/campus\/wp-json\/wp\/v2\/posts\/228475","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ibkrcampus.com\/campus\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ibkrcampus.com\/campus\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ibkrcampus.com\/campus\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/ibkrcampus.com\/campus\/wp-json\/wp\/v2\/comments?post=228475"}],"version-history":[{"count":0,"href":"https:\/\/ibkrcampus.com\/campus\/wp-json\/wp\/v2\/posts\/228475\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ibkrcampus.com\/campus\/wp-json\/wp\/v2\/media\/198434"}],"wp:attachment":[{"href":"https:\/\/ibkrcampus.com\/campus\/wp-json\/wp\/v2\/media?parent=228475"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ibkrcampus.com\/campus\/wp-json\/wp\/v2\/categories?post=228475"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ibkrcampus.com\/campus\/wp-json\/wp\/v2\/tags?post=228475"},{"taxonomy":"contributors-categories","embeddable":true,"href":"https:\/\/ibkrcampus.com\/campus\/wp-json\/wp\/v2\/contributors-categories?post=228475"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}