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jjmaxwell4

1,507 karma · joined March 22, 2009

Working on Pillar. Previously founder of Double, Jetfuel.
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jjmaxwell4··on America has lost 200k of jobs in media, film and the arts. How much is AI?
The article missed the massive increase in work for creatives that's happened over the last 10 years. Being a influencer. 3.2M people earned more than $100,000 last year being a influencer, the combined earnings are between probably $25-50B in the US.

You really need to factor them in and their earnings in any discussion like this. It's still smaller than consumer spending on this stuff was before but it's the growing part.

jjmaxwell4··on Things to know when you get cancer
Very sorry to hear this.

Have you checked out any international Clinical Trials? You can search a lot of these here: https://clinicaltrials.gov/ getting the filters right can be tricky though. I’d ask AI for some help looking for the right permutations of names for things.

I’d book a call with FCCT as well. They have a list of private vendors that can potentially help with genetic sequencing and a few other things. They also mentioned a service to me that helps you search for potential clinical trials.

jjmaxwell4··on Things to know when you get cancer – 2026 Edition
Sneaky good advice!
jjmaxwell4··on Things to know when you get cancer
Thank you for the thoughtful appreciation. Agreed on 'talk to someone in your age/strength bracket' for surgery.
jjmaxwell4··on Things to know when you get cancer
Really good advice! There are so many benefits of the big centers, the largest one being speed. At MD Anderson I got a question answered within 20 minutes of my visit to a Dr that happened by him calling the pathologist. If that wasn't at a cancer center, it would have take days, or more likely, the question never would have been answered at all.
jjmaxwell4··on Things to know when you get cancer
Yeah, while what I wrote was true the takeaway should have been something like:

- You should pressure test anything an AI says with your doctors, and anything a doctor says with AI.

jjmaxwell4··on Things to know when you get cancer
Yeah I did not mean that as a indication to not trust AI. But rather to use it as a companion and pressure test things doctors say with AI and things AI say with doctors.
jjmaxwell4··on Things to know when you get cancer – 2026 Edition
This is a good addition, although I have not joined one which is probably why I didn't include it in the list. I should find a group to join.
jjmaxwell4··on Things to know when you get cancer – 2026 Edition
Glad it could be useful, and wishing you the best of luck with things
jjmaxwell4··on [dead]
The url got messed up somehow. Trying to delete but can't
jjmaxwell4··on Google Antigravity exfiltrates data via indirect prompt injection attack
I know that Cursor and the related IDEs touch millions of secrets per day. Issues like this are going to continue to be pretty common.
jjmaxwell4··on Show HN: Onit – open-source ChatGPT Desktop with local mode, Claude, Gemini
The idea of a universal AI assistant across the desktop is cool. Like the emphasis on local processing and provider choice.

I have tried out V1 and while it's a bit barebones, the planned features like 'Autocontext' and 'Local-RAG' sound promising. Devil's in the implementation details though.

jjmaxwell4··on Launch HN: Double (YC W24) – Index Investing with 0% Expense Ratios
Yes we've thought about them a fair bit.

We believe that in most ETFs right now the transaction costs are largely factored into either the expense ratio or the ETF bid-ask spread, exactly due to the redemption mechanism you discussed. See section titled Spread of the Underlying Securities in an ETF Basket in the following PDF and the following quote:

"If a market maker has to obtain a portion of the ETF constituents on the secondary market to then deliver into the fund as part of the basket process, the cost of acquiring those names should be reflected in the ETFs bid/ask spread — as costs are traditionally passed through to the end customer."

https://www.ssga.com/library-content/pdfs/etf/au/spdr-au-etf...

Also we take estimated spread costs into account when running our portfolio optimization. A higher bid-ask spread as measured by past 1 month NBBO p50 spread generally gets penalized in our portfolio optimization all else being equal, although this depends slightly on what optimization setting you've chosen on Double.

jjmaxwell4··on Launch HN: Double (YC W24) – Index Investing with 0% Expense Ratios
You are correct the in-kind creation/redemption pushes any taxable gains/losses to the trading of the ETF by the holder, not the ETF itself.

But there are some benefits to doing what you refer to as a "custom one-off fund". Namely we can Tax Loss Harvest any losses and realize those to offset gains we realize in the name of rebalancing. The industry generally calls this direct indexing and wealth clients with $1M and above portfolios have been doing it for years.

We also provide the option of entering a "Buy & Hold" optimization for strategies, which would not rebalance your winners into losers and realizing any gains or losses, but your portfolio will drift over time if you choose this.

jjmaxwell4··on Launch HN: Double (YC W24) – Index Investing with 0% Expense Ratios
Other than fees, we are also quite a bit more customizable than most other options you mentioned. We let you do things like rebalance between positions and pick your optimization type, and backtest a screened portfolio. More customizable than most robo-advisors out there and more powerful than brokerages like M1.
jjmaxwell4··on Launch HN: Double (YC W24) – Index Investing with 0% Expense Ratios
No relation but I have shared some emails with the founder and we are both in SF I believe.
jjmaxwell4··on Launch HN: Double (YC W24) – Index Investing with 0% Expense Ratios
We choose to lead with the expense ratio savings in this marketing push, but I really think the platform allows for the best investment account out there with tax loss harvesting built in, dollar cost averaging between positions and stock or sector customization.
jjmaxwell4··on Launch HN: Double (YC W24) – Index Investing with 0% Expense Ratios
I'd argue the specifics are quite a bit different than Yotta/Synapse.

We do not hold any funds ourselves. You connect your bank and ach/wire money to an Apex bank account. You can verify your holdings via apex anytime (see: https://help.double.finance/en/articles/10262406-how-can-i-v...)

jjmaxwell4··on Launch HN: Double (YC W24) – Index Investing with 0% Expense Ratios
We don't currently offer Roth IRA or 401K accounts, but once we do then yes it would be possible to transfer the account without changing the tax-advantaged status.
jjmaxwell4··on Launch HN: Double (YC W24) – Index Investing with 0% Expense Ratios
We optimize (look at the account) daily but only trade if the portfolio meaningfully improves.

We take into account tax rates while optimizing your account. You can also chose to put your strategy in Buy & Hold which will never sell anything thus never realize any cap gains.

jjmaxwell4··on Launch HN: Double (YC W24) – Index Investing with 0% Expense Ratios
If Double goes out of business, your assets are safe and held in your name at Apex Clearing. They have processes in place for these scenarios to help you access and transfer those assets.

SIPC protection covers against a brokerage firm failing, which in our case is Apex Clearing. We are not currently a brokerage so SIPC would not apply if Double goes bankrupt.

jjmaxwell4··on Launch HN: Double (YC W24) – Index Investing with 0% Expense Ratios
Yes we allow this right now very easily, although we don't call it "soft shorting". You can remove or de-weight specific stocks or sectors quite easily.
jjmaxwell4··on Launch HN: Double (YC W24) – Index Investing with 0% Expense Ratios
Fair point! We also let you build a pretty customized indexes, and migrate between positions easily over time. For example, you can diversify away from your employer or your employers sector, or over or under weight specific stocks you'd like.
jjmaxwell4··on Launch HN: Double (YC W24) – Index Investing with 0% Expense Ratios
Very fair! Bogle is the true OG and our inspiration
jjmaxwell4··on Launch HN: Double (YC W24) – Index Investing with 0% Expense Ratios
Interesting - how can we make this more believable? Link to their LinkedIns?
jjmaxwell4··on Launch HN: Double (YC W24) – Index Investing with 0% Expense Ratios
Thanks - worked hard on the backtester despite it not being front and center product wise.

We currently have 50+ strategies. About 30 of these replicate popular ETFs. MTUM is one of them (https://double.finance/p/explore/124). Here are our 4 factor focused portfolios (https://double.finance/p/explore/factor-thesis). If there are more you want to see please let us know as we can most likely add them.

MIDU is unfortunately not eligible to be traded on a fractional basis by Apex. Main things missing are some new/low volume ETFs and ADRs (although we have some of them).

jjmaxwell4··on Launch HN: Double (YC W24) – Index Investing with 0% Expense Ratios
Appreciate that and its good feedback.
jjmaxwell4··on Launch HN: Double (YC W24) – Index Investing with 0% Expense Ratios
Complementing a Direct Index US 500 portfolio with Small Cap or International ETFs is very possible. You can exposure yourself to US Small Cap and International through ETFs - there is the related ETF expense ratio in that case.
jjmaxwell4··on Launch HN: Double (YC W24) – Index Investing with 0% Expense Ratios
Appreciate the kind words and feedback.
jjmaxwell4··on Launch HN: Double (YC W24) – Index Investing with 0% Expense Ratios
The account is opened in your name and your securities are held in your name at Apex Clearing. Apex has more than 19M brokerage accounts opened.

We are Registered Investment Advisor (RIA) regulated by the SEC.

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