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iav

585 karma · joined August 5, 2011

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iav··on NautilusTrader: Open-source algorithmic trading platform
This is pretty comprehensive. I work at a quant firm, and we don't even have some of this implemented in code. The tricky part is always going to be the integration. Nautilus has its own OMS system, but so does IBKR, and there is no guarantee that they are going to match.

For very small funds, running entirely on IBKR platform (or Alpaca if you can live with their constraints) makes sense. For very large funds, you invariably will have a home-grown system that integrates with all of your expensive vendors. But if you are starting from scratch and want to scale up, using this to bootstrap quickly is most efficient.

iav··on Only Teslas exempt from new auto tariffs thanks to 85% domestic content rule
Items that contain multiple elements get the highest tariff rate of any of them - a glass window with aluminum frame gets the aluminum rate because it’s the highest one.
iav··on Google Being Forced to Sell Chrome Is Not Good for the Web
Mobile Safari exists though. Chrome is #2 on iOS and that’s where the most valuable consumers are
iav··on Feds Link Cyberheist to 2022 LastPass Hacks
Except for crypto, losing your passwords is annoying but not irreversible
iav··on Xerox to acquire Lexmark
1. To allow the merger, Congress imposed some pretty onerous restrictions on any collaboration between the two companies. There is a Lexmark board of former US generals who are supervising the divison. 2. Nine star is the owner, but a lot of the preferred equity used to fund the deal came from PAG, an asian private equity firm. Their investment accrues at a pretty high interest rate and eats into Ninestar’s returns. 3. The whole thesis was that Ninestar would be able to control the amount of counterfeit ink for Lexmark printers. But with another Trump term, and lack of ability to integrate the two, the thesis is broken.
iav··on Judge Refuses to Allow Sale of Infowars to The Onion
you need a lot more than 2 bidders for the theory to hold. Repeating the auction just seems pointless, but another avenue could be for the assets to not be sold, and the claimants to receive 100% of the equity of the business. Then over time they can potentially see a better recovery than what they are getting from a sale.
iav··on Ask HN: Why is Pave legal?
I am an investor in equifax. Let me clear up a misconception on where the data comes from. Half the data comes from large enterprise customers, who “sell” the data in exchange for Equifax doing I-9 verification for free. The other half comes from 39 payroll companies. Every single payroll company except for Rippling and Gusto sell paystub data to Euifax. (Rippling will start next year). Those are exclusive revenue share deals. You cannot be a competitive payroll provider without the revenue share from Equifax. So before you blame your employer, they might not be selling it directly and even if they opted out, your payroll company will sell it anyway.
iav··on How economical is your local Taco Bell?
It’s still a Taco Bell with a few much better sit down places in the adjacent strip mall
iav··on NumPy-style broadcasting in Futhark
They might be both valid but will generate a different output (int or range) leading to a compile time error downstream
iav··on MTA board votes to approve new $15 toll to drive into Manhattan
They already put up the toll tag scanners, they are just turned off.
iav··on High Interest Savings Leaderboard
Not to overcomplicate things, but anyone planning to save money for >12 months should be using the BOXX ETF (https://etfsite.alphaarchitect.com/boxx/) to convert the interest income into a long-term capital gain. Even if you end up cashing out before the 12 months, you are still going to pay the same taxes as with a savings account, so there is truly no downside.
iav··on Berkeley's upzoning would be among nation's largest
If a developer is replacing a 2 story, 20 unit building with 20 parking spots with a new 5 story, 50 unit building, they shouldn’t be able to have more than 25 parking spots, as that is already a net increase from the status quo and will thereby increase traffic and congestion (the street isn’t getting wider…). The logical fallacy here is that it assumes those 25 units without a spot won’t just street park.
iav··on Hired: A Modern Take on 'Ed'
This is in Rust? I was expecting Ed to be in C…
iav··on Everyone hates the electronic medical record
Apple Health does a great job of integrating with EMR providers. I can see notes from every doctors visits, my blood test results, Covid tests, and so on all integrated into one app. I can see my sodium levels have gone down since 2019 in a plot chart, or when was the last time I got sick.
iav··on US agency will not reinstate $900M subsidy for Starlink
Hmm, I would like to see a citation on that second comment. You can look at Frontier's last earnings release, they spent $168M of build Capex to pass 332k homes, or $506/home passed in the last quarter. Note that "passing" a home is not the same as connecting a home, there is additional cost involved there. And Frontier has tremendous cost benefit from the fact that they already own the telephone poles that they can reuse and have been doing this for decades at massive scale.

If you think the entire cost of laying fiber is just the cost of boring/digging, then you don't know what you are talking about.

iav··on According to Plutarch, Julius Caesar was once captured by pirates
OP was referring to the Roman Republic, the system of government. The Roman Empire didn't begin until 27 BC, shortly after Caesar.
iav··on Panama Canal is so congested that one ship owner paid $4M to skip the line
The locks are filled with recycled water that is stored in water saving ponds [1], but this only reuses 60% of the water and it doesn't address the other issue that if the water level in the natural lakes in Panama interior is too low, then ships will have a harder time navigating between the locks.

[1] <https://maritime-executive.com/article/panama-canal-first-wa...>

iav··on WinRAR zero-day exploited since April to hack trading accounts
WinRAR is (was?) developed in Russia, so it always seemed like a great way for the Russian FSB to hack foreign systems.
iav··on Flush with rain, CA plans to replenish depleted groundwater with floodwaters
Short of flooding our cities and towns in the valley, how does one replenish groundwater? My understanding is that's sort of like putting toothpaste back into the tube.
iav··on Stripe faces $3.5B tax bill as employees' shares expire
when the gain shows up is irrelevant - IRS requires taxes to be paid on income in the quarter it is realized. Everyone needs to pay the estimated tax and then file the return for the final adjustment.
iav··on How to Build an Exchange (2017)
They don't. Remember that NASDAQ's clients are Jane Street, Goldman Sachs, i.e. not you or me. They don't onboard a client with doing due diligence. Then there is a clearing and settlement system called DTCC that requires every firm to post collateral equal to their trading volume. This system's primary job is to make sure everyone has enough funds to pay for their trades across all exchanges, not just NASDAQ.
iav··on Federal judge overrules NIH veterinarians about lab chimp retirement
Sort of related - the price of chimps has gone up 10x during COVID from $2k to $20k. Multiple factors, there was a corruption scandal in Cambodia (see ticker NOTV that is being investigated) that caused those exports to stop and China has stopped exporting chimps because their own pharma industry is booming
iav··on US annual inflation declines to 7.7% in October vs. 7.9% expected
GDP grew +2% in Q3, after declining in Q1 and Q2. Gross Domestic Income (similar to GDP but measured differently) grew consistently the entire year. And unemployment rate has declined consistently every single month and stands at 3.57%. I think it would be hard to thread a needle to call any part of YTD 2022 as a recession with this kind of fact pattern. Only if unemployment rate starts to increase in a dramatic way can we really go back and say we were in a recession this year.
iav··on Musk’s inner circle worked through weekend to cement Twitter layoff plans
The C suite has an incredible amount of influence to block a deal with a non-strategic acquirer like Elon. The threat of all executives resigning en masse can knee cap a business.
iav··on Apple’s new App Store tax on ads is a direct shot at Meta
All billboards are by definition untargeted ads, and they are not at all only for "megaa-corps and erection pills". You can still use context to target an ad at a particular audience e.g. a hosting provider advertising on StackOverflow.
iav··on Investors bought a quarter of US homes sold last year
Not sure if you are aware, but all forms of interest expense is tax deductible for corporate income tax purposes in the United States, not just mortgage interest. This conforms to codes in other countries. There is no subsidy that is specific enough to rentals or investment properties. And since most of corporate bank lending is secured by all assets (including real estate), mortgage debt is somewhat fungible with other secured corporate debt, so it would be pointless to try to tax one but not the other.
iav··on Improving Postgres text search speed
I used a trigger function to detect long text and trim the source before it got indexed. That meant that any text over 500kb just got dropped from the index. I also used one index per long text field rather than combining with other fields.
iav··on FTC takes action to stop Opendoor from cheating potential sellers
The reason they have to bid below market is because they face adverse selection bias - if they bid low, nothing happens but every time they bid high they will lose money.
iav··on What Happens When Texans Protest Their “Mind-Boggling” Property Taxes?
It doesn’t have to be the city. you can imagine an interesting system where instead of an appraisal, every property owner puts their own valuation and computes their own tax. The catch is that anyone is able to buy the property at the assessed price for cash, without any negotiations or any opportunity to match. You will see tax evasion go to zero immediately and enforcement cost will also be zero.
iav··on Former Coinbase PM charged in cryptocurrency insider trading tipping scheme
Those days pretty much all brokerages will provide a feed of your trading activity and open positions to a 3rd party compliance aggregator like ComplySci. No login details needed, the feed is read-only, and only has need-to-know information. It requires double opt in - you provide information to your employer, and then the brokerage will confirm with you that you authorized the feed. But if you have a weird account that doesn't support this system, then you always have the option of entering them manually and certifying that you haven't missed any.
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