professor @Columbia_Biz / research @paradigm @uniswap / stochastic control, quantitative finance, market microstructure, blockchain
new york city
- Tweets 483
- Following 1,847
- Followers 3,500
- Likes 5,342
Pinned Tweet
The gaslighting here is astonishing. Acting President @ClaireShipman should speak for herself. As a @Columbia faculty member I do not share her values of authoritarian university governance and enforcement of ideological conformity, all to advance a racist Trump admin agenda.
Acting University President Claire Shipman, CC ’86, SIPA ’94, described Columbia’s Wednesday agreement with President Donald Trump’s administration to pay $220 million to restore funding as “in line with our values” in her first interview with Spectator.
l8r.it/agLK
8
1
35
6,811
ciamac moallemi retweeted
How good a price do you actually get when trading on chain?
We tested major DEX aggregators (Uniswap, CoW, 0x, 1inch) in a week-long live randomised experiment, executing real wETH/USDC swaps across eight venues.
1
1
159
congrats to @zjasper and the team at @hyperbolic_labs!
We started Hyperbolic to make the world’s compute unified, productive and liquid.
Today, we’re announcing our new $30M round to keep building toward that.
Grateful to our team, customers, and investors for believing in us. There’s a lot more to build.
1
3
731
ciamac moallemi retweeted
I'm going to Columbia to speak to some students, and apparently you need ID and a QR code to visit the campus. They locked it down after the Gaza protests and still haven't reopened it. It's the only Ivy League university that's closed to visitors.
134
79
2,627
272,512
ciamac moallemi retweeted
📢 DeFi researchers: submit your work to the 6th Workshop on Decentralized Finance (DeFi'27) @IFCA_Conference, Barbados, Feb 12, 2027
Important dates (AoE):
Abstract registration: Nov 16
Full paper: Nov 23
EasyChair link coming soon
ifca.ai/fc27/defi
2
2
8
533
ciamac moallemi retweeted
"if you want to auto-delever in a way that's going to minimize your future risk of equity shortfalls, then you have to focus on the accounts that are closest to insolvency, and that is going to be the most highly leveraged accounts."
@ciamac from @columbia_biz explores the optimal way to ADL on perps exchanges.
1
8
433
ciamac moallemi retweeted
Auto-deleveraging is essential, and the industry standard may be broken.
@ciamac of @Columbia_Biz uses Hyperliquid’s data from October 10 to show how current ADL rules can be gamed and proposes a model with nearly 3x the risk reduction.
1:27 Why traders hate ADL
2:07 October 10 took $2B on Hyperliquid
3:16 Every exchange copy-pasted BitMEX's rule
3:37 How to game the current system
5:07 Why leverage is the right ADL priority
8:23 How leverage-based ADL can't be gamed
10:01 October 10 with 3x the protection
1
10
612
Really? Let’s form a committee? Needless bureaucracy is an unfortunately a @Columbia tradition. A disappointing start for the new president.
An important update regarding campus access from President Jennifer L. Mnookin: president.columbia.edu/news/…
ALT Aerial view of the Columbia University campus, featuring the iconic Low Memorial Library with its grand dome and steps, surrounded by university buildings and green spaces.
2
16
1,348
Thank you @ZohranKMamdani!
New: Mamdani’s admin is officially coming out in favor of restoring public access to Columbia University’s main campus, reversing his predecessor’s support for keeping it closed due to safety concerns over pro-Palestinian protests.
w/ @madinatoure politico.com/news/2026/09/04…
1
5
756
We're not stuck, you just haven't looked. Nobody has produced evidence of "risk of violence" — not Columbia, not its lawyers, not in any published data, not in three years. You've mistaken your own feelings for a security assessment, and the neighborhood is walking six blocks around it. You're also not speaking for campus. In the Senate's own poll, "very comfortable reopening" beat "very uncomfortable" 62 to 5.
We're stuck - the risk of violence is too great with a mayor who said he would refuse police even when needed to protect students and campus functioning.
4
9
1,259
This post, like much of the discourse around the pied-a-terre tax, is riddled with inaccuracy and demonstrates astonishing ignorance. For starters, the tax for condos is based on the DOF market value, which is a fraction of the market value.
If you really believe this logic, NYC condo prices should have collapsed. But they haven't. So the market doesn't believe this nonsense.
Some math regarding the pied-a-terre tax.
If I own a $5 million condo, the tax is 6.5% - every year, forever. That's $325,000.
Prospective buyers understand this, and they 're not stupid. They price it in.
They calculate, or "capitalize," the obligations, determining the present value of all that debt.
The numbers are devastating. Using a discount rate (or "cap rate") of 6% means you knock $5.4 million off the value of the property...
...meaning you wouldn't even take the property if it was given to you for free...
...meaning the value of the condo has been reduced to less than zero from $5 million.
You've been Zohran'd.
So, a fair question to ask is, "If my $5 million condo is now worth zero, am I now exempt from the tax? And does my exemption drive the value back to $5 million, so now I'm getting taxed again?"
Does anyone understand how insane this is?
11
929
ciamac moallemi retweeted
Can ADL be designed better? @ciamac presents a “water-filling” approach that targets the most leveraged accounts first, and shows how it could reduce substantially more exchange risk.
2
1
20
1,353
ciamac moallemi retweeted
More #hyperliquid from CBER @NYUStern
@ciamac @Columbia_Biz explains auto-deleveraging and offers an alternative. Donghwa Shin @kenanflagler provides comments:
2
7
607
Nice work by @Qiaoqiao2001!
I solved 6 open Erdős problems in 5 days, using @OpenAI GPT-5.6 Sol.
I have a math background, but the Codex workflow I used does not require deep mathematical knowledge.
Here’s exactly how I approached it, including my prompts 🧵
1
8
1,222
new paper w/ @malleshpai @Weiye_Xi @Qiaoqiao2001
a principled approach to quantifying uncertainty in prediction markets 👇
🚨New Paper with @Weiye_Xi , @ciamac and @Qiaoqiao2001
Here’s two different prediction markets priced at ~6.5%:
1. Will the US confirm the existence of Aliens in 2026?
2. *that* Spurs @ Knicks Game 4, ~4th quarter.
They suggest that both these events are the same probability, but intuitively these feel very different: the latter (Knicks won!) feels a lot more uncertain. But prediction markets don’t immediately give us a way to quantify it.
3
11
1,055
ciamac moallemi retweeted
Under stress, derivatives protocols have to make hard decisions in real time:
→ How options decay
→ How leverage is reduced
→ How ADL is triggered
→ How losses are allocated
→ How solvency is restored
Full recap of the Perpetual Futures & Derivatives track at D²: substack.com/home/post/p-203…
3
4
19
1,689
ciamac moallemi retweeted
I am sad to hear of the passing of Dimitri Bertsekas. This one hurts.
Dimitri had a big effect on my career, from inspiring research topics to writing one of my tenure letters.
A long thread on memories of Bertsekas and some of his works that influenced me the most.
4
32
275
14,645
ciamac moallemi retweeted
D² brings together research on DeFi protocol design, incentives, and market behavior
Across two days, the program spans:
→ DeFi Microstructure
→ Perpetual Futures & Derivatives
→ Mechanism Design
→ Prediction Markets
→ AMMs
Learn more: designingdefi.xyz
6
9
53
30,678
The leadership at @Columbia seek to discipline a student for ... criticizing the trustees. So much for academic freedom and open discourse. The fish rots from the head down.
Having cut a horrible deal with Trump giving him oversight of the university, @Columbia may be the worst campus in the United States for free speech, especially about Israel. It is threatening to discipline a student for distributing this legitimate flyer. trib.al/quwTJcC
1
8
671