{"_meta":{"attribution":"Data aggregated by pdata.world (https://pdata.world) from 8 prediction-market venues; CC BY 4.0; source data © each venue.","canonical_url":"https://pdata.world/events/polymarket/1269713","as_of":"2026-10-28T10:36:09.823571Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Polymarket): \"Which companies added to S&P 500 in Q4 2026?\" — 12 markets; highest \"Credo Technology (CRDO)\" at 34% as of 2026-10-28 UTC. https://pdata.world/events/polymarket/1269713","source_url":"https://polymarket.com/event/which-companies-added-to-sp-500-in-q4-2026"},"source":"polymarket","id":"1269713","ticker":"which-companies-added-to-sp-500-in-q4-2026","slug":"which-companies-added-to-sp-500-in-q4-2026","title":"Which companies added to S&P 500 in Q4 2026?","description":"The S&P 500 undergoes quarterly reconstitution on the third Friday of March, June, September, and December. The next rebalance is currently scheduled for December 18, 2026.\n\nThis market will resolve to \"Yes\" if S&P Global Inc. announces that the listed company will be added to the S&P 500 index by December 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to \"No.\"\n\nTo qualify, the listed ticker must match the announced ticker added to the index.\n\nAn announcement from S&P will qualify for a \"Yes\" resolution, regardless of whether the listed company has actually been added to the S&P 500 index by the resolution date.\n\nThe primary resolution source will be official announcements from S&P Global Inc. (https://www.spglobal.com/en/press/press-release).","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/which-companies-added-to-sp-500-in-q1-2026-1arhhAfGipDp.png","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/which-companies-added-to-sp-500-in-q1-2026-1arhhAfGipDp.png","active":true,"closed":false,"start_date":"2026-10-28T03:00:30Z","end_date":"2027-01-01T04:59:00Z","closed_time":null,"volume":5263.4980510000005,"volume_24hr":5283.6180509999995,"volume_24h_change":null,"normalized_vol_24hr":26.62934112548828,"normalized_volume":16.674171447753906,"liquidity":6037.87865,"open_interest":2908.514645,"categories":["Science and Technology","Finance"],"tags":[{"id":"1401","slug":"tech","label":"Tech"},{"id":"120","slug":"finance","label":"Finance"},{"id":"102849","slug":"sp-500","label":"S&P 500"},{"id":"101999","slug":"big-tech","label":"Big Tech"},{"id":"102682","slug":"indicies","label":"Indicies"}],"synthetic":false,"is_group":false,"group_key":null,"parent_event_id":null,"probability":null,"spread":null,"top_outcome":"Credo Technology (CRDO)","top_outcome_probability":0.335,"top_outcome_prob_24h_change":-0.16499999999999998,"top_outcome_volume_24h_change":1051.844331,"updated_at":"2026-10-28T10:23:41.753779Z","fetched_at":"2026-10-28T10:23:41.753779Z","added_at":"2026-10-28T03:19:47.925258Z","url":"https://polymarket.com/event/which-companies-added-to-sp-500-in-q4-2026","chart_24h":[0.0,80.02,134.8754,1272.735336,1876.48665,2374.97665,2742.988144,4442.652475,5243.478051],"kind":"live","mutually_exclusive":false,"markets_total":12,"markets":[{"source":"polymarket","id":"6329948","event_id":"1269713","slug":"will-credo-technology-crdo-be-added-to-the-sp-500-by-december-31-2026","question":"Will Credo Technology (CRDO) be added to the S&P 500 by December 31, 2026?","group_item_title":"Credo Technology (CRDO)","description":"The S&P 500 undergoes quarterly reconstitution on the third Friday of March, June, September, and December. The next rebalance is currently scheduled for December 18, 2026.\n\nThis market will resolve to \"Yes\" if S&P Global Inc. announces that the listed company will be added to the S&P 500 index by December 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to \"No.\"\n\nTo qualify, the listed ticker must match the announced ticker added to the index.\n\nAn announcement from S&P will qualify for a \"Yes\" resolution, regardless of whether the listed company has actually been added to the S&P 500 index by the resolution date.\n\nThe primary resolution source will be official announcements from S&P Global Inc. (https://www.spglobal.com/en/press/press-release).","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/will-credo-technology-crdo-be-added-to-the-sp-500-by-december-31-2026-wlLDynlYhrXY.png","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/will-credo-technology-crdo-be-added-to-the-sp-500-by-december-31-2026-wlLDynlYhrXY.png","outcomes":["Yes","No"],"outcome_prices":[0.335,0.665],"probability":0.335,"spread":0.09,"active":true,"closed":false,"start_date":"2026-10-28T03:00:33Z","end_date":"2027-01-01T04:59:00Z","closed_time":null,"result":null,"volume":1051.844331,"volume_24hr":1051.844331,"prob_24h_change":-0.16499999999999998,"volume_24h_change":1051.844331,"normalized_vol_24hr":18.28760528564453,"normalized_volume":14.209315299987793,"liquidity":177.8897,"categories":["Science and Technology","Finance"],"countries":[],"updated_at":"2026-10-28T10:23:41.799315Z","fetched_at":"2026-10-28T10:23:41.799315Z","added_at":"2026-10-28T03:19:48.021517Z","url":"https://polymarket.com/event/which-companies-added-to-sp-500-in-q4-2026/will-credo-technology-crdo-be-added-to-the-sp-500-by-december-31-2026","event_title":"Which companies added to S&P 500 in Q4 2026?","chart_24h":[0.5,0.265,0.265,0.265,0.265,0.465,0.37,0.275,0.23]},{"source":"polymarket","id":"6329945","event_id":"1269713","slug":"will-astera-labs-alab-be-added-to-the-sp-500-by-december-31-2026","question":"Will Astera Labs (ALAB) be added to the S&P 500 by December 31, 2026?","group_item_title":"Astera Labs (ALAB)","description":"The S&P 500 undergoes quarterly reconstitution on the third Friday of March, June, September, and December. The next rebalance is currently scheduled for December 18, 2026.\n\nThis market will resolve to \"Yes\" if S&P Global Inc. announces that the listed company will be added to the S&P 500 index by December 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to \"No.\"\n\nTo qualify, the listed ticker must match the announced ticker added to the index.\n\nAn announcement from S&P will qualify for a \"Yes\" resolution, regardless of whether the listed company has actually been added to the S&P 500 index by the resolution date.\n\nThe primary resolution source will be official announcements from S&P Global Inc. (https://www.spglobal.com/en/press/press-release).","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/will-astera-labs-alab-be-added-to-the-sp-500-by-december-31-2026-UP35S27peqaa.png","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/will-astera-labs-alab-be-added-to-the-sp-500-by-december-31-2026-UP35S27peqaa.png","outcomes":["Yes","No"],"outcome_prices":[0.285,0.715],"probability":0.285,"spread":0.11,"active":true,"closed":false,"start_date":"2026-10-28T03:00:33Z","end_date":"2027-01-01T04:59:00Z","closed_time":null,"result":null,"volume":210.0,"volume_24hr":230.0,"prob_24h_change":0.13999999999999999,"volume_24h_change":230.0,"normalized_vol_24hr":11.184475898742676,"normalized_volume":8.40344524383545,"liquidity":65.692,"categories":["Science and Technology","Finance"],"countries":[],"updated_at":"2026-10-28T10:23:41.799315Z","fetched_at":"2026-10-28T10:23:41.799315Z","added_at":"2026-10-28T03:19:48.021517Z","url":"https://polymarket.com/event/which-companies-added-to-sp-500-in-q4-2026/will-astera-labs-alab-be-added-to-the-sp-500-by-december-31-2026","event_title":"Which companies added to S&P 500 in Q4 2026?","chart_24h":[0.145,0.265,0.31,0.31,0.27,0.5,0.715]},{"source":"polymarket","id":"6329943","event_id":"1269713","slug":"will-cheniere-energy-lng-be-added-to-the-sp-500-by-december-31-2026","question":"Will Cheniere Energy (LNG) be added to the S&P 500 by December 31, 2026?","group_item_title":"Cheniere Energy (LNG)","description":"The S&P 500 undergoes quarterly reconstitution on the third Friday of March, June, September, and December. The next rebalance is currently scheduled for December 18, 2026.\n\nThis market will resolve to \"Yes\" if S&P Global Inc. announces that the listed company will be added to the S&P 500 index by December 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to \"No.\"\n\nTo qualify, the listed ticker must match the announced ticker added to the index.\n\nAn announcement from S&P will qualify for a \"Yes\" resolution, regardless of whether the listed company has actually been added to the S&P 500 index by the resolution date.\n\nThe primary resolution source will be official announcements from S&P Global Inc. (https://www.spglobal.com/en/press/press-release).","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/will-cheniere-energy-lng-be-added-to-the-sp-500-by-december-31-2026-qFPFzQp5fCuX.png","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/will-cheniere-energy-lng-be-added-to-the-sp-500-by-december-31-2026-qFPFzQp5fCuX.png","outcomes":["Yes","No"],"outcome_prices":[0.26,0.74],"probability":0.26,"spread":0.04,"active":true,"closed":false,"start_date":"2026-10-28T03:00:30Z","end_date":"2027-01-01T04:59:00Z","closed_time":null,"result":null,"volume":245.475402,"volume_24hr":245.475402,"prob_24h_change":0.07500000000000001,"volume_24h_change":245.475402,"normalized_vol_24hr":11.452581405639648,"normalized_volume":8.8985595703125,"liquidity":85.0415,"categories":["Science and Technology","Finance"],"countries":[],"updated_at":"2026-10-28T10:23:41.799315Z","fetched_at":"2026-10-28T10:23:41.799315Z","added_at":"2026-10-28T03:19:48.021517Z","url":"https://polymarket.com/event/which-companies-added-to-sp-500-in-q4-2026/will-cheniere-energy-lng-be-added-to-the-sp-500-by-december-31-2026","event_title":"Which companies added to S&P 500 in Q4 2026?","chart_24h":[0.185,0.405,0.4,0.405,0.335,0.325,0.405,0.255,0.255]},{"source":"polymarket","id":"6329952","event_id":"1269713","slug":"will-affirm-holdings-afrm-be-added-to-the-sp-500-by-december-31-2026","question":"Will Affirm Holdings (AFRM) be added to the S&P 500 by December 31, 2026?","group_item_title":"Affirm Holdings (AFRM)","description":"The S&P 500 undergoes quarterly reconstitution on the third Friday of March, June, September, and December. The next rebalance is currently scheduled for December 18, 2026.\n\nThis market will resolve to \"Yes\" if S&P Global Inc. announces that the listed company will be added to the S&P 500 index by December 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to \"No.\"\n\nTo qualify, the listed ticker must match the announced ticker added to the index.\n\nAn announcement from S&P will qualify for a \"Yes\" resolution, regardless of whether the listed company has actually been added to the S&P 500 index by the resolution date.\n\nThe primary resolution source will be official announcements from S&P Global Inc. (https://www.spglobal.com/en/press/press-release).","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/will-affirm-holdings-afrm-be-added-to-the-sp-500-by-march-31-2026-IaCb68MCrlJE.png","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/will-affirm-holdings-afrm-be-added-to-the-sp-500-by-march-31-2026-IaCb68MCrlJE.png","outcomes":["Yes","No"],"outcome_prices":[0.255,0.745],"probability":0.255,"spread":0.07,"active":true,"closed":false,"start_date":"2026-10-28T03:00:33Z","end_date":"2027-01-01T04:59:00Z","closed_time":null,"result":null,"volume":150.787436,"volume_24hr":150.787436,"prob_24h_change":-0.010000000000000009,"volume_24h_change":150.787436,"normalized_vol_24hr":9.525077819824219,"normalized_volume":7.400904655456543,"liquidity":416.4303,"categories":["Science and Technology","Finance"],"countries":[],"updated_at":"2026-10-28T10:23:41.799315Z","fetched_at":"2026-10-28T10:23:41.799315Z","added_at":"2026-10-28T03:19:48.021517Z","url":"https://polymarket.com/event/which-companies-added-to-sp-500-in-q4-2026/will-affirm-holdings-afrm-be-added-to-the-sp-500-by-december-31-2026","event_title":"Which companies added to S&P 500 in Q4 2026?","chart_24h":[0.265,0.265,0.265,0.205,0.285,0.205,0.25,0.25,0.255]},{"source":"polymarket","id":"6329951","event_id":"1269713","slug":"will-alnylam-pharmaceuticals-alny-be-added-to-the-sp-500-by-december-31-2026","question":"Will Alnylam Pharmaceuticals (ALNY) be added to the S&P 500 by December 31, 2026?","group_item_title":"Alnylam Pharmaceuticals (ALNY)","description":"The S&P 500 undergoes quarterly reconstitution on the third Friday of March, June, September, and December. The next rebalance is currently scheduled for December 18, 2026.\n\nThis market will resolve to \"Yes\" if S&P Global Inc. announces that the listed company will be added to the S&P 500 index by December 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to \"No.\"\n\nTo qualify, the listed ticker must match the announced ticker added to the index.\n\nAn announcement from S&P will qualify for a \"Yes\" resolution, regardless of whether the listed company has actually been added to the S&P 500 index by the resolution date.\n\nThe primary resolution source will be official announcements from S&P Global Inc. (https://www.spglobal.com/en/press/press-release).","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/will-alnylam-pharmaceuticals-alny-be-added-to-the-sp-500-by-march-31-2026-0se1WnT1h13v.png","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/will-alnylam-pharmaceuticals-alny-be-added-to-the-sp-500-by-march-31-2026-0se1WnT1h13v.png","outcomes":["Yes","No"],"outcome_prices":[0.25,0.75],"probability":0.25,"spread":0.04,"active":true,"closed":false,"start_date":"2026-10-28T03:00:33Z","end_date":"2027-01-01T04:59:00Z","closed_time":null,"result":null,"volume":768.396988,"volume_24hr":768.396988,"prob_24h_change":0.095,"volume_24h_change":768.396988,"normalized_vol_24hr":16.67635726928711,"normalized_volume":12.957389831542969,"liquidity":135.5708,"categories":["Science and Technology","Finance"],"countries":[],"updated_at":"2026-10-28T10:23:41.799315Z","fetched_at":"2026-10-28T10:23:41.799315Z","added_at":"2026-10-28T03:19:48.021517Z","url":"https://polymarket.com/event/which-companies-added-to-sp-500-in-q4-2026/will-alnylam-pharmaceuticals-alny-be-added-to-the-sp-500-by-december-31-2026","event_title":"Which companies added to S&P 500 in Q4 2026?","chart_24h":[0.155,0.265,0.265,0.16,0.18,0.18]},{"source":"polymarket","id":"6329950","event_id":"1269713","slug":"will-rocket-companies-rkt-be-added-to-the-sp-500-by-december-31-2026","question":"Will Rocket Companies (RKT) be added to the S&P 500 by December 31, 2026?","group_item_title":"Rocket Companies (RKT)","description":"The S&P 500 undergoes quarterly reconstitution on the third Friday of March, June, September, and December. The next rebalance is currently scheduled for December 18, 2026.\n\nThis market will resolve to \"Yes\" if S&P Global Inc. announces that the listed company will be added to the S&P 500 index by December 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to \"No.\"\n\nTo qualify, the listed ticker must match the announced ticker added to the index.\n\nAn announcement from S&P will qualify for a \"Yes\" resolution, regardless of whether the listed company has actually been added to the S&P 500 index by the resolution date.\n\nThe primary resolution source will be official announcements from S&P Global Inc. (https://www.spglobal.com/en/press/press-release).","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/will-rocket-companies-rkt-be-added-to-the-sp-500-by-december-31-2026-W2uDNfZn6djA.png","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/will-rocket-companies-rkt-be-added-to-the-sp-500-by-december-31-2026-W2uDNfZn6djA.png","outcomes":["Yes","No"],"outcome_prices":[0.215,0.785],"probability":0.215,"spread":0.01,"active":true,"closed":false,"start_date":"2026-10-28T03:00:33Z","end_date":"2027-01-01T04:59:00Z","closed_time":null,"result":null,"volume":146.6,"volume_24hr":335.6,"prob_24h_change":0.11,"volume_24h_change":335.6,"normalized_vol_24hr":12.785360336303711,"normalized_volume":7.31868839263916,"liquidity":84.2423,"categories":["Science and Technology","Finance"],"countries":[],"updated_at":"2026-10-28T10:23:41.799315Z","fetched_at":"2026-10-28T10:23:41.799315Z","added_at":"2026-10-28T03:19:48.021517Z","url":"https://polymarket.com/event/which-companies-added-to-sp-500-in-q4-2026/will-rocket-companies-rkt-be-added-to-the-sp-500-by-december-31-2026","event_title":"Which companies added to S&P 500 in Q4 2026?","chart_24h":[0.105,0.265,0.37,0.205,0.215,0.135,0.155]},{"source":"polymarket","id":"6329954","event_id":"1269713","slug":"will-mongodb-mdb-be-added-to-the-sp-500-by-december-31-2026","question":"Will MongoDB (MDB) be added to the S&P 500 by December 31, 2026?","group_item_title":"MongoDB (MDB)","description":"The S&P 500 undergoes quarterly reconstitution on the third Friday of March, June, September, and December. The next rebalance is currently scheduled for December 18, 2026.\n\nThis market will resolve to \"Yes\" if S&P Global Inc. announces that the listed company will be added to the S&P 500 index by December 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to \"No.\"\n\nTo qualify, the listed ticker must match the announced ticker added to the index.\n\nAn announcement from S&P will qualify for a \"Yes\" resolution, regardless of whether the listed company has actually been added to the S&P 500 index by the resolution date.\n\nThe primary resolution source will be official announcements from S&P Global Inc. (https://www.spglobal.com/en/press/press-release).","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/will-mongodb-mdb-be-added-to-the-sp-500-by-december-31-2026-VxAxhByzj_Fr.png","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/will-mongodb-mdb-be-added-to-the-sp-500-by-december-31-2026-VxAxhByzj_Fr.png","outcomes":["Yes","No"],"outcome_prices":[0.205,0.795],"probability":0.205,"spread":0.03,"active":true,"closed":false,"start_date":"2026-10-28T03:00:33Z","end_date":"2027-01-01T04:59:00Z","closed_time":null,"result":null,"volume":230.48691,"volume_24hr":230.48691,"prob_24h_change":0.06,"volume_24h_change":230.48691,"normalized_vol_24hr":11.193131446838379,"normalized_volume":8.696969032287598,"liquidity":1166.2449,"categories":["Science and Technology","Finance"],"countries":[],"updated_at":"2026-10-28T10:23:41.799315Z","fetched_at":"2026-10-28T10:23:41.799315Z","added_at":"2026-10-28T03:19:48.021517Z","url":"https://polymarket.com/event/which-companies-added-to-sp-500-in-q4-2026/will-mongodb-mdb-be-added-to-the-sp-500-by-december-31-2026","event_title":"Which companies added to S&P 500 in Q4 2026?","chart_24h":[0.145,0.14,0.185,0.205,0.21,0.21,0.21,0.21,0.21]},{"source":"polymarket","id":"6329956","event_id":"1269713","slug":"will-sofi-technologies-sofi-be-added-to-the-sp-500-by-december-31-2026","question":"Will SoFi Technologies (SOFI) be added to the S&P 500 by December 31, 2026?","group_item_title":"SoFi Technologies (SOFI)","description":"The S&P 500 undergoes quarterly reconstitution on the third Friday of March, June, September, and December. The next rebalance is currently scheduled for December 18, 2026.\n\nThis market will resolve to \"Yes\" if S&P Global Inc. announces that the listed company will be added to the S&P 500 index by December 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to \"No.\"\n\nTo qualify, the listed ticker must match the announced ticker added to the index.\n\nAn announcement from S&P will qualify for a \"Yes\" resolution, regardless of whether the listed company has actually been added to the S&P 500 index by the resolution date.\n\nThe primary resolution source will be official announcements from S&P Global Inc. 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The next rebalance is currently scheduled for December 18, 2026.\n\nThis market will resolve to \"Yes\" if S&P Global Inc. announces that the listed company will be added to the S&P 500 index by December 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to \"No.\"\n\nTo qualify, the listed ticker must match the announced ticker added to the index.\n\nAn announcement from S&P will qualify for a \"Yes\" resolution, regardless of whether the listed company has actually been added to the S&P 500 index by the resolution date.\n\nThe primary resolution source will be official announcements from S&P Global Inc. 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