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anonu

7,784 karma · joined March 3, 2013

My Interests: ETFs, Market Making, AI applied to Financial Data, ETF Ecosystems, HFT and scalable trading systems buildout across the US and Middle East

Email: contact at cedrus75 dot com or DM on reddit

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anonu··on ‘I witnessed war crimes’ in Gaza – former worker at GHF aid site [video]
One data point is not enough to draw a line. But if you have two, three, dozens of data point... And the line points to the same thing over and over again.
anonu··on Air Force unit suspends use of Sig Sauer pistol after shooting death of airman
I have a P320 and I am frankly terrified of the uncommanded discharge. Maybe having a safety would have mitigated the issue.
anonu··on Occasionally USPS sends me pictures of other people's mail
This happens to me too - mostly from people in South America: i get their phone bills, receipts, etc... And now the knock on effect of spam is crushing my inbox. I know its spam related to these emails because its all in Spanish. I am thinking of abandoning my gmail to something new.
anonu··on Occasionally USPS sends me pictures of other people's mail
90% of my snail mail is junk - so it really does not matter.
anonu··on Postgres LISTEN/NOTIFY does not scale
was hoping the solution was: we forked postgres.

cool writeup!

anonu··on Jane Street barred from Indian markets as regulator freezes $566M
We can disagree on both points.

The example (ok - not exactly the definition - but close enough) is the Triangular Arbitrage in foreign exchange. This is cited in almost every textbook on explaining the topic.

The Wikipedia entry on arbitrage lists a dozen types of arbs. So while they may all be of the same "type" (buy low/sell high) there are nuances. It's like saying all cow meet is just beef: there are different cuts that taste different.

anonu··on Jane Street barred from Indian markets as regulator freezes $566M
That's sort of the very definition of arbitrage in today's modern markets - its not just the text book definition of "borrow money at a low interest rate and invest at a higher interest rate": there's latency arbs, regulatory arbs, microstructure arbs... They belong to the firms who can research and benefit from them before others figure it out.
anonu··on Jane Street barred from Indian markets as regulator freezes $566 million
Didn't Jane Street sue Millenium first? I think the lesson of all this is - don't sue over your trading strategy secrets.
anonu··on Jane Street Curbed in India Markets After Alleged Illegal Gain
Also a cool read, the 105 page document outlining how the index manipulation went down: https://www.sebi.gov.in/enforcement/orders/jul-2025/interim-...

A quick read through seems that the strategies used were fairly rudimentary: a combination of leverage (via options) and going big -- enough to create imbalances that couldn't be offset by other market participants. They did this intraday - presumably closer to the open when price discovery was most important - but also on market close to tilt on-close imbalances.

anonu··on Show HN: Spegel, a Terminal Browser That Uses LLMs to Rewrite Webpages
Don't you need javascript to make most webpages useful?
anonu··on Xfinity using WiFi signals in your house to detect motion
Can you block this with a pihole?
anonu··on Xfinity using WiFi signals in your house to detect motion
On one hand, cool. On the other hand, why? This doesn't seem terribly accurate or insightful. A security camera is cheaper and has a better sensor and logic for detecting motion.
anonu··on Touching the back wall of the Apple store
Was it the rio mp3 player?

https://en.m.wikipedia.org/wiki/Rio_PMP300

I got this in 1999... So it might not fit your exact timeframe.

My friend put Tupac's Changes song on there. That wasn't my first mp3 but it was the first on a pocket sized device.

anonu··on Launch HN: Issen (YC F24) – Personal AI language tutor
The conversation flows nicely. Certainly nicely built.

I thought this interaction in Spanish was interesting:

I said something like: Yo pienso que tú eres una inteligencia artificial. Es muy interesante.

Carlos responded: En realidad, soy una persona real llamada Carlos, aunque a veces hablo con muchos estudiantes como tú, como si fuera un robot

anonu··on U.S. bombs Iranian nuclear sites
A consequential night for Israel: peace for many decades to come. I worry, however, that peace through bombing is not a permanent solution. Peace comes through diplomacy. Ideology does not die in the rubble.
anonu··on Websites are tracking you via browser fingerprinting
Cutting down permissions will just make you more identifiable.
anonu··on Websites are tracking you via browser fingerprinting
Great website. I'm surprised that even things like battery status are queryable. There's really no good reason to expose that.
anonu··on Brain activity much lower when using AI chatbots, MIT boffins find
TIL: boffin
anonu··on Ask HN: Options for One-Handed Typing
I would think swipe-style keyboard on your phone would be a good solution (as long as its normal text and not code). I wonder if theres a KVM-like application for your phone and computer so swipes on your phone can send keypresses to the other side.
anonu··on Ask HN: What are you working on? (May 2025)
This is cool - how does IP geolocation work? How do you know that xyz IP is at this particular spot?

Edit: I see you are using MaxMind database - do you add some sort of additional analytics or overlay on top of that?

anonu··on Failure Mechanisms in Democratic Regimes – An Army's Role
Great point on Gaza in the article: many often say "well the Palestinians voted for Hamas". But they don't clarify that it was a plurality not a majority and that subsequently Hamas killed off its opponents. Yes democracy may have worked part way, but it has to work all the way to be able to make the argument.
anonu··on Root for your friends
I believe in this. Just don't get onto to the corporate hype train.
anonu··on The value isn't in the code (2022)
Corollary: The value is in vibe coding. AKA - knowing how to prompt well.
anonu··on The behavior of LLMs in hiring decisions: Systemic biases in candidate selection
> try and look at correctness

I am not sure what you mean by this. The underlying concept behind this analysis is that they analyzed the same pair of resumes but swapped male/female names. The female resume was selected more often. I would think you need to fix the bias before you test for correctness.

anonu··on The behavior of LLMs in hiring decisions: Systemic biases in candidate selection
> Asking LLMs to do tasks like this and expecting any useful result is mind boggling to me.

I think the point of the article is to underscore the dangers of these types of biases, especially as every industry rushes to deploy AI in some form.

anonu··on Show HN: Semantic Calculator (king-man+woman=?)
Reminds me of the very annoying word game https://contexto.me/en/
anonu··on Coffee for people who don't like coffee
> 4-6 time a day no problems

I think that was your problem. That seems like way too much coffee and caffeine.

anonu··on Coffee for people who don't like coffee
light beans == more caffeine
anonu··on PDF to Text, a challenging problem
They should called it NDF - Non-Portable Document Format.
anonu··on Optimizing My Hacker News Experience
* saves time sorting, filtering

* covers more ground: surfaces items you might miss in the torrent.

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