15 September 2026.

New York is sunny and noticeably cooler: 72°F today, 59°F tonight, with no rain expected. A light layer will be useful after dark. In Aurora, expect about 75°F / 55°F and the possibility of a stray afternoon thunderstorm—worth remembering before committing to the courtyard between sessions. NWS New York

Reporting checked through 6:18 a.m. ET.

Schonfeld’s discretionary macro unit now has nearly 150 investment staff and 45 trading pods, more than twice last year’s headcount, according to reporting published Monday. It added 15 portfolio managers during 2026 and accounts for close to one-fifth of the $23 billion firm’s daily market activity. “Market activity” leaves capital, risk and profit contribution unspecified—an important gap in a leveraged multi-asset business. Business Insider, September 14

The growth has come with an almost complete change of personnel. Of the portfolio managers present when the unit started trading in early 2022, former Goldman managing director Francesco Cafagna is the sole reported survivor. Recent departures include former risk head Marwan Moubachir and PM Manas Baveja, both headed to Dymon Asia, and recruiter Ryan McCort, who moved to Brevan Howard. Schonfeld says firmwide PM turnover is only 2% annually, which makes the concentration of departures in this young unit more notable.

The reported results are strong but incomplete: the macro business is said to have made money in 84% of its trading months with a Sharpe above 3. Its returns are not disclosed separately from the flagship Partners fund, which gained 0.2% in August and 6.8% year to date. Those figures are press-reported; vehicle, share class and net/gross basis were not established.

For a multi-manager platform, 45 pods can provide genuine breadth across rates, FX, commodities and regional policy cycles. It can also produce many differently named versions of the same inflation, curve or dollar trade. The operating achievement is the ability to replace departures without interrupting the franchise. The investment question is whether the apparent diversification persists after exposures are decomposed by macro factor, liquidity horizon and crowded exit. A 150-person unit gives Schonfeld more shots; it also makes aggregation quality part of the product.

The SEC approved a change to the Consolidated Tape Plan yesterday that caps an exchange’s quote-related revenue at five times its trade-related revenue in each periodic distribution. Any excess is redistributed among the other plan members. FINRA is exempt, and an exchange receiving no more than $50,000 a year in quote revenue gets a de minimis exception intended to avoid penalizing a small new venue. SEC approval order, September 14

The numbers behind the filing explain why the cap exists. In 2024, Long-Term Stock Exchange’s quote-to-trade revenue ratio was approximately 107:1 on Tape A, 70:1 on Tape B and 88:1 on Tape C. NYSE Chicago, now NYSE Texas, had ratios above 20:1 in parts of 2021–24. The typical plan member has been well below 5:1. SIFMA’s later sample suggests the rule would have affected three exchanges in 2025 and two in the first quarter of 2026. The target is a small set of venue economics.

The mechanism matters because consolidated-data revenue can subsidize an exchange that posts frequently at the NBBO, often in high-priced or inactive stocks, while executing little flow. The approved cap weakens that particular business model without removing payment for useful quotations. It may alter where marginal quoting is encouraged, although routing behavior should only change if displayed quality or fill probability changes with it.

LTSE’s objection deserves more than ceremonial acknowledgement: an exchange can quote aggressively and still trade little because routers favor venues with a history of fills, larger displayed size or better fee tiers. Executions are therefore a rough test of contribution and an incomplete measure of price discovery. The approval order gives no implementation date. Once it takes effect, watch which capped venues reduce NBBO time or size—and whether any lost quotes were actually executable.

Optiver said Monday that it is building more direct relationships outside the interdealer FX-options market while maintaining its bank business. It trades listed and OTC options in one principal book and says it is connected to more than 70 institutions, providing liquidity 23 hours a day, five days a week. Planned extensions include non-deliverable option pairs, additional crosses, vanilla tenors beyond one year and, eventually, exotics likely beginning with digital assets. Optiver, September 14

This is a direct statement of competitive intent from a market maker; Optiver gives no notional volume, spreads, hit rates or client mix. The revealing statistic is its estimate that FX options remain 96% OTC and 4% listed. A non-bank dealer with a unified book can warehouse risk and hedge across venues instead of forcing every OTC trade through an inadequate listed market. Clients will still care about the credit, documentation, collateral and netting advantages of their banks.

The likely contest is therefore over distribution as much as pricing. Banks retain valuable client relationships and netting sets. Optiver is betting that faster principal pricing and a broader view of listed and OTC risk can justify another bilateral connection. Watch whether the expansion produces disclosed client volumes and whether banks treat it as useful capacity or a channel conflict.

SEBI’s closing auction for derivatives-linked stocks began on August 3 and produced violent indicative-price swings on expiry days. The regulator is now consulting on two settlement choices: blend the final 30 minutes of continuous trading with the 10-minute auction, or revert to the old 30-minute VWAP for at least a year. It also proposes cutting the post-auction derivatives window from ten minutes to five, restricting cancellation of orders more than 1% from the reference price, and withholding the estimated closing index during the auction. Comments close October 3. Reuters, September 15

The last proposal breaks the visible feedback loop between an unstable indicative cash close and derivatives still trading against it. That may reduce reflexive volatility, but it also removes information precisely when participants are trying to manage expiry exposure. The cancellation restriction has a different effect: an off-market order becomes more of a commitment once submitted. Both changes deserve testing against the full indicative path as well as the final uncross. Jefferies expects implementation in October or November; SEBI has not supplied that timetable.

The most directly relevant technical session is Jörg Lotze’s “Death by a Thousand Tape Entries” at 9–10 a.m. MDT, on reducing automatic-differentiation overhead in scientific and financial C++. The announced approach uses a chunked arena allocator and targets the allocation and cache costs that accumulate when a reverse-mode tape records millions of small operations. The claimed production result—overhead around four times the primal calculation—belongs in the talk’s evidence column until the workload, memory profile and differentiation pattern are clear. Official session

At 10:30 a.m.–noon in Colorado A, the language-design panel brings together Bjarne Stroustrup, Guido van Rossum and Mads Torgersen. Yesterday’s recommendation still stands, now with the exact slot: three designers defending different bargains among safety, simplicity, performance and compatibility should be more revealing than three isolated road maps. Schedule

At 4:45–5:45 p.m., Greg Law and Mark Williamson’s “You’re absolutely wrong!” session asks how agents can debug complex C++ when source code alone does not expose the failing runtime state. It is a vendor-led argument for giving agents execution context, so listen for the boundary between a persuasive demonstration and a repeatable workflow: what traces are captured, how hypotheses are tested and what prevents a plausible explanation from becoming the answer by momentum. Official session

Tomorrow’s unusually relevant block is the official ISO C++ low-latency / embedded / games / finance / machine-learning study-group meeting, 1–4:30 p.m. in Red Rock 1. It is longer and less polished than a conference talk, which is part of the appeal: the arguments that survive into standards usually begin with awkward constraints rather than keynote slides. Official schedule

Public sale opens at 10 a.m. MDT / noon ET for Luca Guadagnino’s Artificial at the New York Film Festival. The first choice is the world premiere on Monday, October 5 at 5 p.m. at Alice Tully Hall, followed by a Q&A with Guadagnino; Film at Lincoln Center says members of the cast will also attend, without naming which ones. A second screening with Guadagnino Q&A is listed for Tuesday, October 6 at 2:30 p.m. Film and showtimes, premiere announcement

The attraction remains unusually specific: Andrew Garfield as Sam Altman, Yura Borisov as Ilya Sutskever and Mark Rylance as Geoffrey Hinton, with a Simon Rich screenplay and songs and score by Damon Albarn. The film runs 140 minutes. There are no independent reviews yet, so the director Q&A and the improbable creative combination are carrying the recommendation.

Go through the NYFF purchase calendar when sales open. Main Slate tickets are listed at $35 public / $30 member, with a maximum of two per screening; the checkout was closed overnight, so no selectable inventory could be confirmed beforehand. Put October 5 first and October 6 second. Sale instructions and terms

The Chiefs beat the Broncos 31–10 last night. Kenneth Walker III, making his Kansas City debut, ran for a career-high 173 yards and scored twice, including a 60-yard rushing touchdown. The Chiefs finished with 220 rushing yards; Denver managed only 176 total yards, nine first downs and a 2-for-12 conversion rate on third down. Reuters game report

Patrick Mahomes’s return from December knee surgery was encouraging: 15 of 27 for 184 yards, two passing touchdowns, one interception and a rushing score. Bo Nix went 17 of 28 for 131 yards, threw an early interception, lost a fumble and took four sacks. Travis Kelce’s 71 receiving yards moved him past Jason Witten into second place on the career list for tight ends, at 13,073.

Denver’s offense could not sustain anything. The line and quarterback produced too many negative plays for the skill positions to acquire useful volume. One opener cannot settle the season, but the protection changes should be the first check before trusting a Week 2 rebound narrative.

BETTING — PASS today. There is a full MLB schedule, but no current independent probability with documented inputs could be paired with a timestamped, executable FanDuel or DraftKings price before lineups. A posted sportsbook number without the other half of the comparison is just a number. No play recommended.

Slovak label Mappa released the 51-track Synthetic Water Music compilation on September 10; Pitchfork’s first review arrived Monday. Start with the three-minute “A River Song”, an archival 1986 collaboration between Ursula K. Le Guin and composer Todd Barton.

Barton built instruments for the Kesh, the invented culture in Le Guin’s Always Coming Home, and the pair treated the recording as imaginary ethnomusicology: music documenting a people who never existed. That is a more compelling entry than attempting the entire three-hour compilation at once. The wider set moves among field recordings, ambient electronics and new commissions, gradually descending from fountains and droplets into marshes and a Lovecraftian submerged city. Official album and release date, Pitchfork review, September 14

The track is archival; the timely discovery is its placement in this new collection. If it lands, continue with Eva Sajanová’s 94-second “Oh, to Be a Fountain,” where voice and splashing water make the piece together.

Widow’s Bay won 14 Emmys last night, the most ever for a comedy in a single season, including comedy series and acting awards for Matthew Rhys, Stephen Root and Kate O’Flynn. The trophies point toward an unusual premise: a skeptical mayor tries to turn an isolated New England island into a tourist destination while the residents insist it is cursed. They are, inconveniently, correct. AP Emmy report

Apple TV subscription; ten episodes, generally 36–41 minutes. Start with “Welcome to Widow’s Bay!” (41 minutes). Matthew Rhys plays municipal optimism against superstitious islanders, with Hiro Murai directing the opening episodes and Katie Dippold building each installment around a different local horror story. The tone is deadpan small-town comedy with an actual mystery underneath, closer to an eccentric genre piece than a prestige obligation. Watch on Apple TV, Apple’s series description, Guardian review

The season includes cannibal legends, monsters, cursed fog and some gore. Choose it if a funny, atmospheric mystery sounds appealing tonight and genuine scares are welcome. One episode is enough to tell whether the balance works for you.