Citadel Securities is a leading quantitative trading firm and market maker.

Chicago, IL
Joined October 2016
Singapore Exchange has become a multi-asset exchange. Loh Boon Chye, CEO of SGX, gives us five key trends supporting its strategy.
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Biased data, biased AI? Our senior advisor Stu Feldman is optimistic that the AI bias challenge can be solved:
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We’re proud to be the Designated Market Maker for these incredible companies. (Photo credit: NYSE)
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Inflation is rising. The Federal budget deficit soared to new highs in 2020. Is the US on a sustainable fiscal course? Former Chair of the Federal Reserve Dr. Ben Bernanke weighs in:
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"Most markets functioned incredibly well during last year's crisis and that's a good sign because markets don't just work–they require a lot of attention." Paul Hamill discusses how the market has evolved at the Milken Institute's 2021 Global Conference.
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The National Stock Exchange of India is evolving to support the country's economic growth. CEO Vikram Limaye tells the story:
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What are the shared priorities of market regulators across Asia? Hear from our Chief Legal Officer Heath Tarbert:
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Dr. He Fan explains how China's growth trajectory will evolve - and why investors should look inland for their next opportunity:
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Congratulations to all our partners who listed on the NYSE in November. We’re proud to be your designated market maker! (Photo credit: @NYSE)
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AI is transforming science. Senior Advisor Stu Feldman explains the impact of machine learning on climate research:
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Is inflation a one-off blip or an ongoing challenge? Watch a fascinating discussion between two former central bank leaders, Dr. Ben Bernanke and Dr. Raghu Rajan: invidious.fdn.fr/watch?v=jB9xYt_Z…
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We've wrapped up our third annual 2021 APAC Financial Leaders Forum, with thought-provoking contributions from Dr. Ben Bernanke, Mark Carney, Dr. Raghu Rajan, Stu Feldman and others. We'll share some of the highlights over the coming weeks.
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Here is the email from 5:11 AM ET on January 28th alerting Robinhood to the $3 billion margin call.
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Robinhood’s CEO testified under oath that the $3 billion margin call “exceeded the amount of net capital at Robinhood Securities” and that led to it imposing trading restrictions.
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Robinhood’s President & COO submitted a sworn declaration in federal court that the trading restrictions were “a way to mitigate the sudden increase in the NSCC deposit requirements.”
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The DTCC, the parent company of the NSCC, corroborated Robinhood’s statements regarding the margin call in a letter to Representative McHenry.
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Show this thread
Our primary Robinhood point person had to ask Robinhood if the Twitter posts on the trading restrictions were “fact or fiction?”
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We’re thrilled to support this week’s @WomeninETFs Global 2021 Conference which aims to inspire and elevate the next generation of the ETF industry. Learn more here: on.citadel.com/2YeTLx1
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In our recent CONNECT//Conversations series, puzzle creator @davidkwong led us through interactive puzzles designed to unlock creativity by looking at familiar things in new ways. #CONNECTatCS
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During our interactive workshops at the National University of Singapore and the Nanyang Technological University, students will learn about the role of technology in market making and the skills needed for a career at Citadel Securities. on.citadel.com/3nbzHXi
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