September 26, 2026

The CDC's September 24, 2026 update to its measles dashboard recorded 3,659 confirmed U.S. measles cases for the year, surpassing the 3,650 threshold in question and up from 3,471 reported a week earlier on September 17. Of the total, roughly 95 percent were outbreak-associated, split between outbreaks that began in 2026 and ones carried over from 2025. Pennsylvania remained the hardest-hit jurisdiction, reporting 835 cases as of September 23, amid an outbreak that has also produced multiple deaths. Nationally, 47 jurisdictions reported cases, and about 9 percent of patients required hospitalization. The update came the same week the CDC confirmed the year's first measles death and acknowledged discrepancies with Pennsylvania's own higher death count. The 2026 case total is the highest annual figure since the United States declared measles eliminated in 2000, reflecting declining vaccination rates in several states and sustained person-to-person spread within under-vaccinated communities. The rapid week-over-week case growth, nearly 200 additional cases in a single week, continued a trend that had defined the outbreak through the summer and into fall. The prediction community correctly anticipated the increase, with 63 percent expecting the count to top 3,650.

No formal three-way talks among the United States, Russia and Ukraine had convened by September 26, 2026. U.S. envoys Steve Witkoff and Jared Kushner traveled to Moscow and Kyiv in early September without reaching a breakthrough on a broader ceasefire framework. By September 25, both Kyiv and Moscow confirmed they were open to relaunching trilateral talks, with the United Arab Emirates proposed as a host, but no meeting had taken place. Ukrainian President Volodymyr Zelensky said the U.S. had proposed a "technical level" three-way format and that Kyiv was still awaiting a specific date from Washington, adding that Ukraine would consult with European allies while the U.S. continued separate discussions with Russia. The stalled diplomacy followed a monthslong lull since the last round of trilateral talks in February, as U.S. attention had shifted toward the conflict with Iran even as fighting in Ukraine continued. The prediction community was essentially split, with 50 percent expecting talks to occur, reflecting genuine uncertainty about the diplomatic timeline that ultimately resolved toward no meeting happening within the window.

The Centers for Disease Control and Prevention updated its national 2026 measles tally on September 23, 2026, to include one death, ending three weeks in which Pennsylvania's measles-associated fatalities had been absent from the federal count. Pennsylvania has reported four measles-associated deaths in 2026: two unvaccinated Lancaster County residents announced August 25, marking the state's first measles deaths in 35 years; a 40-year-old Jefferson County resident who died September 12; and an unvaccinated 18-year-old Mifflin County resident who died of acute disseminated encephalomyelitis, a rare neurological complication of measles. The CDC did not disclose which specific death it added or where it occurred, and flagged the figure as "subject to change" pending further review, while noting it is still investigating the other deaths reported by Pennsylvania. The discrepancy had drawn criticism of the CDC under Director Erica Schwartz, who had reportedly directed staff to initially exclude the Pennsylvania deaths from the dashboard. The update came amid the largest annual U.S. measles case count since the disease was declared eliminated in 2000. The prediction community leaned "no" at 62 percent, making this a community miss as the CDC added a death before the deadline.

President Trump hosted Chinese President Xi Jinping for a state dinner at the White House on September 24, 2026, roughly 40 days before the U.S. midterm elections, but the two governments did not jointly announce a trade deal that day. Treasury Secretary Scott Bessent said upon Xi's arrival that the two sides had agreed to extend their tariff truce through January 10, 2026, and to lower tariffs on an estimated $30 billion in goods, but neither government released full tariff schedules, and officials described the arrangement as an extension of the existing truce rather than a new comprehensive deal. Xi's own statement, issued separately through the Chinese embassy, did not reference trade at all, focusing instead on rhetoric about the two countries being "partners, not rivals." U.S. Trade Representative Jamieson Greer said the tariff terms were the product of weeks of prior phone negotiations rather than dinner-table diplomacy. The dinner itself featured prominent U.S. tech executives, including Elon Musk, Tim Cook and Sam Altman, but produced no signed agreement. The prediction community leaned "no" at 61 percent, correctly anticipating that no discrete deal announcement would occur specifically on the dinner date.

AAA's national average price for a gallon of gasoline reached $4.48 by September 24, 2026, up nearly 5 cents from the previous week but short of the $4.55 threshold in question. The increase pushed the average to its highest level for this time of year on record, according to AAA. Analysts pointed to continued volatility around the Strait of Hormuz and elevated global crude oil costs following weeks of tension tied to the broader Iran conflict, which had disrupted regional shipping and tightened supply expectations. Prices had already climbed 16 cents in the week before the question's window began, part of a monthslong upward trend that left every state more expensive at the pump than a year earlier. The national average continued rising through late September but did not cross $4.55 within the specified window. The prediction community leaned toward "yes" at 63 percent, expecting prices to breach that mark, making this a community miss, though the underlying trend the community was reacting to, rising pump prices amid Middle East tensions, proved directionally correct even as the specific threshold held.

Darden Restaurants, parent of Olive Garden and LongHorn Steakhouse, reported fiscal first-quarter 2027 results on September 24, 2026. Diluted earnings per share came in at $2.05, narrowly missing the Wall Street consensus of $2.06 a share flagged in the question. Net sales rose 5.1 percent to $3.20 billion, just short of the roughly $3.21 billion analysts expected. Performance diverged sharply by brand: Olive Garden's same-restaurant sales grew only 1.1 percent, hurt by lingering customer concerns tied to a cyclospora illness cluster and disrupted dining patterns during World Cup viewing, while LongHorn Steakhouse posted 6.2 percent growth. Shares fell as much as 5 percent in premarket trading before paring losses after executives reassured investors on the earnings call. CEO Rick Cardenas said trends had improved into September and that commodity costs, including beef, were expected to ease later in the fiscal year. Darden reaffirmed its full-year guidance of $11.10 to $11.35 in earnings per share despite the quarterly miss. The prediction community correctly anticipated the shortfall, with only 25 percent expecting Darden to clear the $2.06 bar, aligning with the eventual narrow miss.

Tesla launched paid Cybercab robotaxi service in Austin, Texas on September 3-4, 2026, putting vehicles without steering wheels, pedals or mirrors into public use for the first time. At the invitation-only launch event, Tesla did not name a second city or lay out a service-expansion calendar, and no second city had been announced as of September 26. The rollout drew immediate regulatory attention: the National Highway Traffic Safety Administration opened an investigation the same week into Tesla's self-certification that the Cybercab meets federal motor-vehicle safety standards written for human-driven cars, focusing on the absence of manual controls. Tesla has since shipped a substantial number of Cybercabs and Model Y Robotaxis to Houston, fueling speculation that Houston would be next, but the company has not confirmed a date or location. Executives had previously suggested additional cities would follow "within weeks" of the Austin launch, a timeline the company had not met by the question's deadline. The prediction community was close to split, with 53 percent expecting a second city to be named, making this a narrow miss driven largely by the open regulatory scrutiny and Tesla's reluctance to commit to firm rollout dates.

The University of Michigan's Surveys of Consumers reported a final September 2026 Consumer Sentiment Index reading of 48.1, released September 25. The final figure came in above both the preliminary estimate of 47.8 and the 47.6 consensus forecast compiled by Reuters, meaning it did not fall below the 48.0 threshold in question. The index still marked a four-month low, down from 51.7 in August, as inflation worries and elevated fuel prices weighed on households. The survey's Consumer Expectations component fell 10.4 percent to 46.3, while the Current Economic Conditions gauge slipped 1.9 percent to 50.9. Year-ahead inflation expectations climbed to 4.6 percent from 4.0 percent in August, the steepest such reading since June. University of Michigan economists tied the deterioration to concerns that re-escalating trade disputes and rising prices could spread further through the economy ahead of the midterms. Despite the gloomy underlying data, a small upward revision between the preliminary and final readings kept the index just above the 48 mark. The prediction community had leaned heavily toward "yes" at 79 percent, expecting the final number to land below 48, making this one of the larger community misses in recent weeks.

Chinese President Xi Jinping made his first U.S. state visit since 2015, meeting President Trump in Washington from September 22-24, 2026. The two leaders did not hold a joint press conference at the conclusion of their bilateral meeting on September 24. Instead, each side issued separate, uncoordinated announcements. Treasury Secretary Scott Bessent said upon Xi's arrival that Washington and Beijing had agreed to extend their tariff truce through January 10, 2026, originally set to expire November 10. Xi's own statement, released through the Chinese embassy, made no mention of trade at all, saying instead that "China and the United States should be partners, not rivals." The split messaging reflected continued friction over trade, technology export controls, Taiwan and Iran even as both governments sought a cordial tone, including a White House state dinner attended by tech executives Elon Musk, Tim Cook and Sam Altman. The lack of a joint appearance departed from the precedent set when Presidents Obama and Xi took questions together during Xi's 2015 visit. The prediction community leaned toward "no" at 56 percent, correctly anticipating that no joint conference would take place.