Caitlin Ostroff

"In one meeting, Trump passed a stack of news articles he and other senior officials thought threatened national security to Blanche with a sticky note on it that said 'treason,' another administration official said." wsj.com/politics/natio…

Who wins on prediction markets? High-frequency traders. We examined 1.6 million Polymarket wallets and found that the top 0.1% highest-frequency traders are by far the most likely to turn a profit. One of those traders is Jonathan Stall-Ryan (pictured), whose firm of around a dozen college students turned $1,000 into seven figures. They're one of the top crypto traders on Kalshi and make tens of thousands of trades a day.

Join our team and write about the people and forces shaping markets. Huge bets on AI. Macro trades affecting nations. Succession dramas. Individual investors making exotic wagers. Requires first-class reporting and the writing to do it justice. dowjones.jobs/new-york-ny/re…

The U.S. government says its agents are under attack. Most of the alleged culprits in the tweets were U.S. citizens. From my @WSJ colleagues @noslouch, @brenna__smith, @HannaCritch, @bellecushing and @emmatscott wsj.com/us-news/immigr…

My friend wrote a book and you should buy it 📚

Sorry. Phone died. What did I miss? In the meantime, I wrote a book

NEW: A fraternity that counts Jeff Bezos' stepson as a member under investigation for insider trading. Polymarket-branded beer pong sets. $20,000 in funding to open a prediction market club. Here's how prediction markets are gaining ground on campus. wsj.com/business/media…

“We know this shouldn’t be allowed,” said one brother involved. “People are like, is this insider information? Is this regulated? You feel like you’re doing something you’re not supposed to. It feels like someone should stop you.” Must-read: wsj.com/business/media…

ICYMI: My latest with @sgurman

Did Polymarket finally go too far? It's just removed a betting market on nuclear detonation, amid intense debates over the ethics of war betting and the risks of insider trading on military strikes. From @ceostroff wsj.com/livecoverage/s…

My latest with the great @sgurman

New: After a @WSJ analysis identified more than 40,000 files that appeared to be missing from the DOJ’s website, a DOJ spokeswoman said that “47,635 files were offline for further review and should be ready for re-production by the end of the week.” wsj.com/us-news/law/th…

Kalshi has posted its first disciplinary actions, against a former longshot candidate the California governor and a MrBeast employee. My colleague @kryshur reports on the brave new world of prediction-market enforcement actions wsj.com/business/media…

It's one of the wackiest corners of prediction markets: "mentions", where traders bet on phrases that politicians and celebrities say at upcoming events. Will the words "insider trading" and "manipulation" appear in this story? With @ceostroff @ByKLong wsj.com/finance/invest…

@AndrewForce8 @khadeeja_safdar It’s in print today!

@ceostroff @khadeeja_safdar Could you please tell me if this appeared in Feb 18 or Feb 19 print edition?

On May 3, 2016, Epstein sent an email to Kathy Ruemmler. He wrote that Jean-Luc Brunel was planning to go to prosecutors the following week and one of Brunel’s friends had “asked for 3 million dollars so that Jean Luc would not go in.” w/@khadeeja_safdar wsj.com/us-news/epstei…

@ryangrim An effort by so many in the newsroom. Thank you for reading!

WSJ is doing some very strong reporting on this beat

@emsteck @khadeeja_safdar Thank you for reading!

Another banger from WSJ's @khadeeja_safdar and @ceostroff.

@KFILE Thanks, Andrew!

Incredible WSJ story wsj.com/us-news/epstei…

New via WSJ: French modeling scout Jean-Luc Brunel was secretly negotiating in 2016 with lawyers representing Epstein's victims, according to DOJ files. Brunel's lawyer told them his client recruited girls for Epstein and had incriminating photographs. Then Brunel went dark. wsj.com/us-news/epstei…