--- title: "Mark Kelly VP odds crater as WNBA and MLB playoffs dominate sports markets" description: "A 92-point collapse in Mark Kelly's VP odds headlines a week in which postseason upsets and shifting Fed hike expectations drove the biggest market moves." canonical_url: https://betcrypto.now/news/2026-09-30-mark-kelly-vp-odds-crater-as-wnba-and-mlb-playoffs-dominate published_at: 2026-09-30T16:20:51+00:00 language: en publisher: BetCrypto content_type: ai-generated generated_by: "claude-sonnet-4-6" source_data: https://betcrypto.now (live prediction-market prices) events: - title: "2028 Democratic VP nominee — In 2028" url: https://betcrypto.now/events/2028-democratic-vp-nominee-in-2028 - title: "Women's Pro Basketball Champion — 2026" url: https://betcrypto.now/events/womens-pro-basketball-champion-2026 - title: "Pro Baseball Champion — 2026" url: https://betcrypto.now/events/pro-baseball-champion-2026 - title: "Republican Presidential Nominee 2028" url: https://betcrypto.now/events/republican-presidential-nominee-2028 - title: "Fed Decision in October?" url: https://betcrypto.now/events/fed-decision-in-october - title: "Fed Decision in December?" url: https://betcrypto.now/events/fed-decision-in-december --- # Mark Kelly VP odds crater as WNBA and MLB playoffs dominate sports markets _A 92-point collapse in Mark Kelly's VP odds headlines a week in which postseason upsets and shifting Fed hike expectations drove the biggest market moves._ Prediction markets were reshaped this week by a political shock, two playoff upsets, and a pivot in Federal Reserve expectations. Volume surged across sports and macro markets as traders repriced outcomes in real time. ## Mark Kelly VP odds collapse from near-certainty Mark Kelly's probability as 2028 Democratic VP nominee fell 92.5 points in seven days, from 97.0% to 4.5%, a move that suggests an earlier market position was badly mispriced rather than driven by any single news event. Kelly said in late September that he will not decide on a 2028 presidential run until after the midterms, and polling places him well below top-tier contenders, which appears to have finally caught up with his prediction-market odds. The field is now fractured among Alexandria Ocasio-Cortez at 8.6%, Pete Buttigieg at 7.0%, and Elissa Slotkin at 6.8%, with a 4.5-point cross-platform spread on AOC suggesting genuine disagreement about who leads the pack. | Outcome | 7 days ago | Now | Change | | --- | --- | --- | --- | | Mark Kelly | 97.0% | 4.5% | -92.5 pts | 24h volume $31,383 · 4 platforms. [Compare live odds for 2028 Democratic VP nominee — In 2028](/events/2028-democratic-vp-nominee-in-2028) ## Minnesota's first-round upset reshapes WNBA title market The top-seeded Minnesota Lynx were swept by No. 8 seed New York Liberty in the 2026 WNBA first round — the first time a No. 1 seed has been eliminated by a No. 8 seed in league history — erasing their 43.0% title probability and sending it to 1.0%. Golden State now leads the field at 24.5%, followed closely by Atlanta at 23.5% and New York at 21.5%, meaning three teams share roughly equal footing with the bracket wide open. | Outcome | 7 days ago | Now | Change | | --- | --- | --- | --- | | Minnesota | 43.0% | 1.0% | -42.0 pts | 24h volume $477,927 · 1 platform · 1 large trade totalling $3,000 (7d). [Compare live odds for Women's Pro Basketball Champion — 2026](/events/womens-pro-basketball-champion-2026) ## Padres playoff run lifts World Series odds to 9.5% San Diego's odds to win the 2026 World Series doubled from 4.4% to 9.5% after the Padres clinched a postseason berth for the third consecutive season and opened the NL Wild Card Series with an 8-0 demolition of the Chicago Cubs. Volume on this market surged 436% week-over-week to over $4 million in 24 hours, reflecting intense trader engagement as the bracket takes shape. The Los Angeles Dodgers remain the market leader at 27.9%, with Milwaukee second at 16.4%. | Outcome | 7 days ago | Now | Change | | --- | --- | --- | --- | | San Diego | 4.4% | 9.5% | +5.1 pts | 24h volume $4,123,511 · 1 platform · 1 large trade totalling $6,318 (7d). [Compare live odds for Pro Baseball Champion — 2026](/events/pro-baseball-champion-2026) ## J.D. Vance holds 2028 GOP lead despite platform spread The Republican 2028 nomination market saw modest movement, with Marco Rubio slipping 1.8 points to 17.3%, while J.D. Vance stays the named frontrunner at 45.3%. The standout feature is a 7.0-point cross-platform spread on Vance — the widest in the field — with Limitless pricing him at just 23.7% against higher figures elsewhere, a divergence that reflects genuine uncertainty about whether a sitting vice president benefits or suffers from the 2028 dynamics. | Outcome | 7 days ago | Now | Change | | --- | --- | --- | --- | | Marco Rubio | 19.0% | 17.3% | -1.8 pts | 24h volume $1,188,927 · 5 platforms · 6 large trades totalling $12,249 (7d). [Compare live odds for Republican Presidential Nominee 2028](/events/republican-presidential-nominee-2028) ## Hike odds for October FOMC meeting drop sharply The probability of a 25 basis point hike at the October 28 FOMC meeting fell 28.7 points this week to 36.5%, with "no change" now the consensus at 60.0%. The September 16 hike to 3.75%–4.00% was unanimous, but subsequent data and commentary appear to have cooled near-term expectations, with 27 large trades totalling $537,897 driving the repricing. A nonfarm payrolls report due October 2 and September CPI on October 14 are the next key catalysts before the decision. | Outcome | 7 days ago | Now | Change | | --- | --- | --- | --- | | 25 bps increase | 65.2% | 36.5% | -28.7 pts | 24h volume $2,938,869 · 3 platforms · 27 large trades totalling $537,897 (7d). [Compare live odds for Fed Decision in October?](/events/fed-decision-in-october) ## December hike now priced as the most likely outcome Even as October hike odds fell, the December meeting market moved the other way: a 25 basis point increase is now priced at 73.0%, up from an implied lower baseline a week ago as "no change" fell 3.6 points to 24.0%. Ten large trades totalling $98,144 drove a 684% surge in weekly volume, consistent with traders rotating their hike expectations from October into December rather than abandoning them altogether. | Outcome | 7 days ago | Now | Change | | --- | --- | --- | --- | | No change | 27.6% | 24.0% | -3.6 pts | 24h volume $410,997 · 2 platforms · 10 large trades totalling $98,144 (7d). [Compare live odds for Fed Decision in December?](/events/fed-decision-in-december) ## The takeaway This window's dominant thread is repricing under uncertainty: a political market corrects a near-certainty, two sporting upsets open wide fields, and rate traders shift their hike bets one meeting further out rather than abandoning them. --- Prices quoted above were current when this brief was written. Follow the event links for live cross-platform odds.