{"id":995282,"date":"2026-08-13T18:16:20","date_gmt":"2026-08-13T22:16:20","guid":{"rendered":"https:\/\/www.marketnewsdesk.com\/index.php\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400\/"},"modified":"2026-08-13T18:16:20","modified_gmt":"2026-08-13T22:16:20","slug":"reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400","status":"publish","type":"post","link":"https:\/\/www.marketnewsdesk.com\/index.php\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400\/","title":{"rendered":"Reddit Set to Join S&amp;P 500 and Sun Communities to Join S&amp;P MidCap 400"},"content":{"rendered":"<div class=\"xn-newslines\">\n<p class=\"xn-distributor\">PR Newswire<\/p>\n<\/p><\/div>\n<div class=\"xn-content\">\n<p>\n        <span class=\"legendSpanClass\">NEW YORK<\/span>, <span class=\"legendSpanClass\">Aug. 13, 2026<\/span> \/PRNewswire\/ &#8212; S&amp;P Dow Jones Indices will make the following changes to the S&amp;P 500 and S&amp;P\u00a0MidCap 400:\u00a0<\/p>\n<ul type=\"disc\">\n<li>Reddit Inc. (NYSE: RDDT) will replace AvalonBay Communities Inc. (NYSE: AVB) in the S&amp;P 500 effective prior to the opening of trading on Tuesday, August 18. S&amp;P 500 constituent Equity Residential (NYSE: EQR) is acquiring AvalonBay Communities in a deal expected to be completed soon, pending final conditions. Post merger, the combined company will be renamed Vivmark Residential (NYSE: VMRK) and will remain in the S&amp;P 500.<\/li>\n<li>Sun Communities Inc. (NYSE: SUI) will replace Webster Financial Corp. (NYSE: WBS) in the S&amp;P MidCap 400 effective prior to the opening of trading on Thursday, August 20. Banco Santander S.A. (BMEX \/ NYSE: SAN) is acquiring Webster Financial in a deal expected to be completed soon pending final conditions.<\/li>\n<\/ul>\n<p>Following is a summary of the changes that will take place prior to the open of trading on the effective date:<\/p>\n<div>\n<table border=\"0\" cellspacing=\"0\" cellpadding=\"1\" class=\"prnbcc\">\n<tr>\n<td class=\"prnpr2 prnpl2 prnvab prntal prncbts prnrbrb1 prnbbbs prnbsbls\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\"><br \/>\n                  <b>Effective Date<\/b><br \/>\n                <\/span>\n              <\/p>\n<\/td>\n<td class=\"prnpr2 prnpl2 prnvab prntal prncbts prnrbrb1 prnbbbs prnsblb1\" colspan=\"2\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\"><br \/>\n                  <b>Index Name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/b><br \/>\n                <\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen4\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\"><br \/>\n                  <b>Action<\/b><br \/>\n                <\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen4\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\"><br \/>\n                  <b>Company Name<\/b><br \/>\n                <\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen4\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\"><br \/>\n                  <b>Ticker<\/b><br \/>\n                <\/span>\n              <\/p>\n<\/td>\n<td class=\"prnpr2 prnpl2 prnvab prncbts prnbrbrs prnbbbs prnsblb1\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\"><br \/>\n                  <b>GICS<\/b><br \/>\n                  <b>\u00a0Sector<\/b><br \/>\n                <\/span>\n              <\/p>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"prngen6\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\"><br \/>\n                  <b>August 18, 2026<\/b><br \/>\n                <\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen7\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">S&amp;P 500<\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen8\" colspan=\"2\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">Addition<\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen7\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">Reddit<\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen7\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">RDDT<\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen7\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">Communication Services<\/span>\n              <\/p>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"prngen6\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\"><br \/>\n                  <b>August 18, 2026<\/b><br \/>\n                <\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen7\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">S&amp;P 500<\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen8\" colspan=\"2\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">Deletion<\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen7\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">AvalonBay Communities<\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen7\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">AVB<\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen7\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">Financials<\/span>\n              <\/p>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"prngen6\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\"><br \/>\n                  <b>August 20, 2026<\/b><br \/>\n                <\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen7\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">S&amp;P MidCap 400<\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen8\" colspan=\"2\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">Addition<\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen7\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">Sun Communities<\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen7\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">SUI<\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen7\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">Real Estate<\/span>\n              <\/p>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"prngen6\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\"><br \/>\n                  <b>August 20, 2026<\/b><br \/>\n                <\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen7\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">S&amp;P MidCap 400<\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen8\" colspan=\"2\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">Deletion<\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen7\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">Webster Financial<\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen7\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">WBS<\/span>\n              <\/p>\n<\/td>\n<td class=\"prngen7\" colspan=\"1\" rowspan=\"1\">\n<p class=\"prnml4\">\n                <span class=\"prnews_span\">Financials<\/span>\n              <\/p>\n<\/td>\n<\/tr>\n<\/table><\/div>\n<p>ABOUT S&amp;P DOW JONES INDICES<\/p>\n<p>S&amp;P Dow Jones Indices is the largest global resource for essential index-based concepts, data and research, and home to iconic financial market indicators, such as the S&amp;P 500\u00ae and the Dow Jones Industrial Average\u00ae. More assets are invested in products based on our indices than products based on indices from any other provider in the world. Since Charles Dow invented the first index in 1884, S&amp;P DJI has been innovating and developing indices across the spectrum of asset classes helping to define the way investors measure and trade the markets.<\/p>\n<p>S&amp;P Dow Jones Indices is a division of S&amp;P Global (NYSE: SPGI), which provides essential intelligence for individuals, companies, and governments to make decisions with confidence. For more information, visit <a href=\"https:\/\/edge.prnewswire.com\/c\/link\/?t=0&amp;l=en&amp;o=4752473-1&amp;h=1510625023&amp;u=https%3A%2F%2Fwww.spglobal.com%2Fspdji%2Fen%2F&amp;a=www.spglobal.com%2Fspdji%2Fen%2F\" target=\"_blank\" rel=\"nofollow\">www.spglobal.com\/spdji\/en\/<\/a>.<\/p>\n<p>\n        <b>FOR MORE INFORMATION:<\/b>\n      <\/p>\n<p>\n        <b>S&amp;P Dow Jones Indices<br \/><\/b><br \/>\n        <a href=\"mailto:index_services@spglobal.com\" target=\"_blank\" rel=\"nofollow\">index_services@spglobal.com<\/a>\u00a0<\/p>\n<p>\n        <b>Media Inquiries<br \/><\/b><br \/>\n        <a href=\"mailto:spdji.comms@spglobal.com\" target=\"_blank\" rel=\"nofollow\">spdji.comms@spglobal.com<\/a>\u00a0<\/p>\n<p id=\"PURL\">\n        <img loading=\"lazy\" decoding=\"async\" title=\"Cision\" width=\"12\" height=\"12\" alt=\"Cision\" src=\"https:\/\/edge.prnewswire.com\/c\/img\/favicon.png?sn=NY26357&amp;sd=2026-08-13\" \/> View original content:<a id=\"PRNURL\" rel=\"nofollow\" href=\"https:\/\/www.prnewswire.com\/news-releases\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400-302851432.html\" target=\"_blank\">https:\/\/www.prnewswire.com\/news-releases\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400-302851432.html<\/a><\/p>\n<p>SOURCE S&amp;P Dow Jones Indices<\/p>\n<\/p><\/div>\n<p>    <img decoding=\"async\" alt=\"\" src=\"https:\/\/rt.prnewswire.com\/rt.gif?NewsItemId=NY26357&amp;Transmission_Id=202608131812PR_NEWS_USPR_____NY26357&amp;DateId=20260813\" style=\"border:0px;width:1px;height:1px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>PR Newswire NEW YORK, Aug. 13, 2026 \/PRNewswire\/ &#8212; S&amp;P Dow Jones Indices will make the following changes to the S&amp;P 500 and S&amp;P\u00a0MidCap 400:\u00a0 Reddit Inc. (NYSE: RDDT) will replace AvalonBay Communities Inc. (NYSE: AVB) in the S&amp;P 500 effective prior to the opening of trading on Tuesday, August 18. S&amp;P 500 constituent Equity Residential (NYSE: EQR) is acquiring AvalonBay Communities in a deal expected to be completed soon, pending final conditions. Post merger, the combined company will be renamed Vivmark Residential (NYSE: VMRK) and will remain in the S&amp;P 500. Sun Communities Inc. (NYSE: SUI) will replace Webster Financial Corp. (NYSE: WBS) in the S&amp;P MidCap 400 effective prior to the opening of trading on Thursday, August 20. &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.marketnewsdesk.com\/index.php\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Reddit Set to Join S&amp;P 500 and Sun Communities to Join S&amp;P MidCap 400&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-995282","post","type-post","status-publish","format-standard","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Reddit Set to Join S&amp;P 500 and Sun Communities to Join S&amp;P MidCap 400 - Market Newsdesk<\/title>\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.marketnewsdesk.com\/index.php\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Reddit Set to Join S&amp;P 500 and Sun Communities to Join S&amp;P MidCap 400 - Market Newsdesk\" \/>\n<meta property=\"og:description\" content=\"PR Newswire NEW YORK, Aug. 13, 2026 \/PRNewswire\/ &#8212; S&amp;P Dow Jones Indices will make the following changes to the S&amp;P 500 and S&amp;P\u00a0MidCap 400:\u00a0 Reddit Inc. (NYSE: RDDT) will replace AvalonBay Communities Inc. (NYSE: AVB) in the S&amp;P 500 effective prior to the opening of trading on Tuesday, August 18. S&amp;P 500 constituent Equity Residential (NYSE: EQR) is acquiring AvalonBay Communities in a deal expected to be completed soon, pending final conditions. Post merger, the combined company will be renamed Vivmark Residential (NYSE: VMRK) and will remain in the S&amp;P 500. Sun Communities Inc. (NYSE: SUI) will replace Webster Financial Corp. (NYSE: WBS) in the S&amp;P MidCap 400 effective prior to the opening of trading on Thursday, August 20. &hellip; Continue reading &quot;Reddit Set to Join S&amp;P 500 and Sun Communities to Join S&amp;P MidCap 400&quot;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.marketnewsdesk.com\/index.php\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400\/\" \/>\n<meta property=\"og:site_name\" content=\"Market Newsdesk\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-13T22:16:20+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/edge.prnewswire.com\/c\/img\/favicon.png?sn=NY26357&amp;sd=2026-08-13\" \/>\n<meta name=\"author\" content=\"Newsdesk\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Newsdesk\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.marketnewsdesk.com\\\/index.php\\\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.marketnewsdesk.com\\\/index.php\\\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400\\\/\"},\"author\":{\"name\":\"Newsdesk\",\"@id\":\"https:\\\/\\\/www.marketnewsdesk.com\\\/#\\\/schema\\\/person\\\/482f27a394d4fda80ecb5499e519d979\"},\"headline\":\"Reddit Set to Join S&amp;P 500 and Sun Communities to Join S&amp;P MidCap 400\",\"datePublished\":\"2026-08-13T22:16:20+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.marketnewsdesk.com\\\/index.php\\\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400\\\/\"},\"wordCount\":411,\"image\":{\"@id\":\"https:\\\/\\\/www.marketnewsdesk.com\\\/index.php\\\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/edge.prnewswire.com\\\/c\\\/img\\\/favicon.png?sn=NY26357&amp;sd=2026-08-13\",\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.marketnewsdesk.com\\\/index.php\\\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400\\\/\",\"url\":\"https:\\\/\\\/www.marketnewsdesk.com\\\/index.php\\\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400\\\/\",\"name\":\"Reddit Set to Join S&amp;P 500 and Sun Communities to Join S&amp;P MidCap 400 - 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Market Newsdesk","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.marketnewsdesk.com\/index.php\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400\/","og_locale":"en_US","og_type":"article","og_title":"Reddit Set to Join S&amp;P 500 and Sun Communities to Join S&amp;P MidCap 400 - Market Newsdesk","og_description":"PR Newswire NEW YORK, Aug. 13, 2026 \/PRNewswire\/ &#8212; S&amp;P Dow Jones Indices will make the following changes to the S&amp;P 500 and S&amp;P\u00a0MidCap 400:\u00a0 Reddit Inc. (NYSE: RDDT) will replace AvalonBay Communities Inc. (NYSE: AVB) in the S&amp;P 500 effective prior to the opening of trading on Tuesday, August 18. S&amp;P 500 constituent Equity Residential (NYSE: EQR) is acquiring AvalonBay Communities in a deal expected to be completed soon, pending final conditions. Post merger, the combined company will be renamed Vivmark Residential (NYSE: VMRK) and will remain in the S&amp;P 500. Sun Communities Inc. (NYSE: SUI) will replace Webster Financial Corp. (NYSE: WBS) in the S&amp;P MidCap 400 effective prior to the opening of trading on Thursday, August 20. &hellip; Continue reading \"Reddit Set to Join S&amp;P 500 and Sun Communities to Join S&amp;P MidCap 400\"","og_url":"https:\/\/www.marketnewsdesk.com\/index.php\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400\/","og_site_name":"Market Newsdesk","article_published_time":"2026-08-13T22:16:20+00:00","og_image":[{"url":"https:\/\/edge.prnewswire.com\/c\/img\/favicon.png?sn=NY26357&amp;sd=2026-08-13","type":"","width":"","height":""}],"author":"Newsdesk","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Newsdesk","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.marketnewsdesk.com\/index.php\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400\/#article","isPartOf":{"@id":"https:\/\/www.marketnewsdesk.com\/index.php\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400\/"},"author":{"name":"Newsdesk","@id":"https:\/\/www.marketnewsdesk.com\/#\/schema\/person\/482f27a394d4fda80ecb5499e519d979"},"headline":"Reddit Set to Join S&amp;P 500 and Sun Communities to Join S&amp;P MidCap 400","datePublished":"2026-08-13T22:16:20+00:00","mainEntityOfPage":{"@id":"https:\/\/www.marketnewsdesk.com\/index.php\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400\/"},"wordCount":411,"image":{"@id":"https:\/\/www.marketnewsdesk.com\/index.php\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400\/#primaryimage"},"thumbnailUrl":"https:\/\/edge.prnewswire.com\/c\/img\/favicon.png?sn=NY26357&amp;sd=2026-08-13","inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.marketnewsdesk.com\/index.php\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400\/","url":"https:\/\/www.marketnewsdesk.com\/index.php\/reddit-set-to-join-sp-500-and-sun-communities-to-join-sp-midcap-400\/","name":"Reddit Set to Join S&amp;P 500 and Sun Communities to Join S&amp;P MidCap 400 - 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