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    The Diff

    thediff.co · Publication · on HN since 2021

    Byrne Hobart's newsletter analyzing finance, technology, and business, with posts on firms like Jane Street and on economic ideas.

    Visit blogHN submissions
    Finance & InvestingBusiness & StrategyTech Industry
    What HN says

    HN commenters repeatedly recommend it as an excellent newsletter for finance and tech, noting even the free version has good content.

    Stats for nerds
    75HN people shared it
    177linked in comments
    2.2Kstory points
    Jun 2026last shared
    2021people per year2026

    Top posts on HN

    1. 1
      Understanding Jane Street
      3 people · 675 points · first shared 2022 · 374 comments on HN
    2. 2
      The Factorio Mindset
      1 person · 464 points · first shared 2022 · 349 comments on HN
    3. 3
      The promise and paradox of decentralization
      2 people · 138 points · first shared 2021 · 95 comments on HN
    4. 4
      A Theory of Grift
      2 people · 111 points · first shared 2024 · 110 comments on HN
    5. 5
      Big Tech Sees Like a State (2020)
      1 person · 88 points · first shared 2024 · 33 comments on HN
    6. 6
      “Bullshit jobs” is a terrible, curiosity-killing concept
      2 people · 79 points · first shared 2024 · 119 comments on HN
    7. 7
      AWS for Industry, but Better: The Railroad Investment Case
      2 people · 73 points · first shared 2022 · 38 comments on HN
    8. 8
      The 30-Year Mortgage Is an Intrinsically Toxic Product (2019)
      1 person · 64 points · first shared 2022 · 149 comments on HN
    9. 9
      When IBM Was the Center of Gravity (2021)
      1 person · 62 points · first shared 2022 · 39 comments on HN
    10. 10
      Refactoring Restaurants
      3 people · 31 points · first shared 2022 · 1 comments on HN

    What HN people wrote when they linked it

    • initramfsJun 2026

      >I must admit I am still having a hard time following you.

      You're not the first. A "sister" project I started in 2020 is hardware focused, and later on, I determined that a lightweight suite for internet would complement the offline stack: https://ei2030.github.io/FemtoTX/#about

      One could say it's a "solution in search of a problem", but game development also is an incubator:

      https://www.thediff.co/archive/a-solution-in-search-of-a-problem/

      There are other Jobs inspired R&D groups out there- a notable one is Ink & Switch: https://www.youtube.com/watch?v=9s8OA08ggbM They use an aircraft carrier vs. bicycle comparison, as Steve Jobs preferred the bike metaphor as an extension of user capabilities.

      Someone here mentioned WAP https://en.wikipedia.org/wiki/Wireless_Application_Protocol which I completely forgot about, and AJAX:

      https://en.wikipedia.org/wiki/Ajax_(programming) These techniques/protocols helped make the Symbian interent experience fast, before other smartphones had many solutions.

      >Why should a household or office download windows update files more than once? Seems like a great idea.

      I agree with you on that. I also use it to share files and updates on my own network, often when transferring Steam games from one PC to another. I meant for non private networks (like internet cafes) is where I thought there might be a security issue.…

    • robocatMay 2025

      Same author talks about Angel investors getting screwed by later rounds.

      Here’s an example of a portfolio company that not only converted angel investor ownership to common stock, but also drastically decreased the number of shares. I started asking for pro-rata side letters in 2017. But I recently found out (the hard way) that it’s common for follow-on investors to completely disregard any pro-rata rights of angel investors. https://www.halletecco.com/blog/angel-investing-part-iii#:~:text=In%20addition%20to%20dilution

      Perhaps also relevant:

      Founders, like entry-level workers, are closer to an option than a stock. There's a good chance that the payoff will be negative (in the sense that sometimes a company going to zero is a significant time-consuming process to investors). Someone who continuously buys out-of-the-money options will bleed money over time, From: https://capitalgains.thediff.co/p/the-favor-trading-economy

    • petalmindFeb 2025

      “What [schools are] bad at is teaching people to win in adversarial environments. And they're also bad at the meta-game of reminding someone that knowing the basic mechanics of some process does not make them an expert, but does make them a mark. Said differently: if you know which hands win in poker, thinking that this means you know how to play the game makes you a mark, not an expert.”

      https://capitalgains.thediff.co/p/teachingfinance

      “And it's hard for a teacher to end a class by telling students that they got an A+ in financial literacy and are now equipped to get ripped off in entirely new ways by an entirely different set of adversaries. But it's also impossible to create a repeatable standardized test that accurately simulates such an adversarial environment, because any time everyone gets the same correct answer, that answer would need to become wrong.”

    • gofreddygoFeb 2024

      Times change. People adapt. Happened before, will happen again. Some adapt willingly, some hesitatingly.

      Current AI wave is a corporate funded experiment desperate to find something compelling beyond controlled demos to economically recoup the deepening hole in their balance sheet. The novelty has begun to wear off, the innovation has started to stagnate and the money running out. The only money making innovation left to be seen is in creating more spam. Thats where I see this wave headed.

      OpenAI has proven it's a shit company with rotten fundamentals playing with a shiny new toy. They will crash and burn spectacularly. As many before have done in various fields.

      My reaction after using any AI tool from the last couple years to do anything meaningful ends with just a big facepalm.

      Its a grift[1]

      [1]: https://www.thediff.co/archive/a-theory-of-grift/

    • rohith2506Aug 2022

      I guess you are completely oblivious to how HFT's work and their actual position in the markets. I am a bit biased considering that I work in the industry but actually working in the industry gave me the inner workings of it and how actually they help to close / tighten the bid - ask spread for various securities.

      I would highly recommend you to read this book ( https://press.princeton.edu/books/hardcover/9780691211381/trading-at-the-speed-of-light ) or if it's too long form, read this article ( https://www.thediff.co/p/jane-street )

      I am not saying HFT's are in charitable business but they do serve an important role in the financial markets.

    • gringoDanFeb 2022

      The NYT's main competitors aren't other newspapers. Their competitors are Substack, Candy Crush, and Netflix.

      As Byrne Hobart points out,

      > "in their latest quarter almost 30% of their new digital subscriptions were for games, cooking, and Wirecutter, rather than news."

      And a bit more cheekily:

      > "When there's a negative New York Times article about a startup, one of the not-uncommon Tech Twitter jokes is that this constitutes bullying from an established, profitable unicorn with over $1bn in annual recurring revenue."

      https://www.thediff.co/p/the-nyt-dead-trees-and-disruption (paywall)

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