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Posted by roberdam 3 days ago

Show HN: In a single HTML file, an app to encourage my children to invest(roberdam.com)
242 points | 429 commentspage 2
meatjuice 3 days ago|
I can feel the vibe-coding "vibe" from every vibe-coded websites, somehow.
lm28469 3 days ago|
When 50% of the words are bold you know you're in for a treat
pton_xd 3 days ago||
My decade in the making habit of only reading HN comments is finally paying off. Nowadays when I do randomly skim an article it's almost always slop.
LandR 3 days ago||
Will they also have periods of a bear market and see their money go down ?
roberdam 3 days ago|
hopefully, “The first national bank of dad” remains solvent.
patapong 3 days ago||
And can they take loans with negotiated interest rates and lock-in periods? Or invest in more risky products such as derivatives with a corresponding chance to lose all money? So much potential... ;)
ozim 3 days ago|||
First they have to fill in KYC questionnaire and have no risky products if they did not have investing experience.
sebastiennight 2 days ago||||
Just add a $6-7CHICKENJOCKEY memecoin where they can put money in, see a 50% daily return for a random period of time, and suddenly have it go to zero.

Or even worse, in the tradition of these unclickable javascript buttons of the late 1990's, just detect when the finger is approaching the "withdraw" button and have the asset crash right before they can click!

roberdam 3 days ago|||
unlimited apps ideas :D
yaky 3 days ago||
Be careful with comparing real-life things and experiences with a (virtual) number on a screen, especially for children.

I used to know an adult who only cared about that number going up, despite making more than a comfortable amount of money. Live with parents, save on rent/mortgage, number goes up faster. Buy cheapest food, take leftovers from work-catered lunches, number goes up faster. Scam your way into being hired for a position you are severely underqualified for, get terminated after three months, keep the salary and sign-on bonus, number goes up. Invest pretty much everything (because there are almost no expenses), compound interest.

ericyd 3 days ago||
This feels like a severe anecdotal example which I'm not sure applies to most people.
yaky 2 days ago||
It is definitely a single point, but that is who this post immediately made me think of.

And to be fair, investing does not apply to most people either.

unmole 2 days ago||
> And to be fair, investing does not apply to most people either.

Why doesn't investing apply to most people?

encrypted_bird 19 hours ago||
Because most people are neither properly educated about investing nor have the money to spare to even start.

Most people are living paycheck to paycheck.

ct0 3 days ago|||
Agreed, in 7th grade we did a stock market simulation, it made winning feel too easy.
nxor 3 days ago||
Ahah but green ticker good red ticker bad. What's the problem sir
dangus 3 days ago||
Being encouraged to invest is nice but having the ability to is a massive luxury.

I knew I wanted to save a lot for my future and retirement since I was in high school. I didn’t gain any reasonable ability to do so until much later.

A much better life skill in my opinion would be to teach about budgeting, how to cook economical meals, how to avoid debt traps and lifestyle inflation.

yaky 2 days ago||
HN is a very specific and privileged demographic, very far from an average citizen. (of the US at least)
encrypted_bird 19 hours ago||
Not the OC, but yeah I've noticed this myself actually. I read HN because I love science and technology, but I don't work in either area. I work at a dead-end job as a cashier and barely make ends meet. Some of the people on here are exceedingly privileged and really don't realize it.
ericyd 3 days ago||
I'm always bummed when I comment on HN and then scroll down and find another comment which said it better.
pmg102 3 days ago||
You're giving a 15% growth rate with zero volatility? That isn't going to teach many important lessons.

How about offering a range of rates with volatility increasing as rate increases. Then they can think about the benefit of guaranteed return vs the benefit of long-term growth, or a combination of both.

sebastiennight 2 days ago|
OP: I think introducing volatility (which you can just model with one percentage variable and a sinusoidal multiplier based on this: 100% volatility means if your "real" balance was going to be $100 today, it varies between $0 and $200 ; 10% volatility means you're fluctuating between $90 and $110) is also a good idea in teaching kids to refrain from the impulse of withdrawing the money just because today's daily gain is in the red.

Another add to the feature request list :)

pmg102 2 days ago||
The biggest challenge with pensions is convincing people in their 20s to invest in high risk/high return investments. This is usually the right strategy because of the long time horizon of several decades until they will need to crystallise losses/gains.

However if they see their pension balance fall in a big correction, they can panic and move to less volatile investments, thus reducing their long term gains.

You can theorize all you want but the best way to learn to cope with this is for it to happen to you so it would be great to include it in the simulation!

thw_9a83c 3 days ago||
Nice! I also created a "virtual bank account" for my kids when they were 7-8yo. They can choose to take the weekly cash or put it in their savings account. My bank gives them a 5% interest rate per month, which isn't bad. Explaining the idea of compound interest this way is easy.

However, I think that's the easier part of being an investor. The more complicated part is risk management. With a savings account, there is basically zero risk. But that's not how you invest these days.

mattmanser 3 days ago|
5% per month? Where is this crazy money generator? Assume you meant per year here!

It's not zero risk:

- Your currency may collapse, see Germany 1930s, Argentina, Zimbabwe, Venezula, etc.

- Only a certain figure is protected in savings, though governments will act aggressively to protect that (see 2008 + the Icelandic/UK/Dutch palava)

thw_9a83c 3 days ago||
Yes, it's 5% per month. You wouldn't be able to explain the concept of a yearly compound interest rate to such young children. One year is an eternity in their life. I also don't give them too much pocket money to encourage them to save. They would spend it on junk food if they had too much cash.

A agree, that the currency is not a 100% safe investment. Inflation especially makes it bad for long-term savings. Indeed, money in any savings account is insured only up to a certain amount. However, that's not something you can explain to kids with a "virtual account." I suppose the idea that Daddy's bank will go bankrupt is probably not an ideal way to teach kids financial literacy.

lutusp 3 days ago||
> I explained to my kids that investing is like having a magic box that generates more money over time.

That is wildly misleading. Investing is super important, but it shouldn't be described in this fairy-tale way. Young people might be misled into trusting investment advisors/counselors/brokers, whose real goal is to enrich themselves at your expense. In fact, there are adults who haven't yet learned this.

An article about investing that doesn't mention the WSJ dartboard contest isn't worth reading -- essentially, over 14 years, random stock picks produced returns equal to those of stockbrokers, before the stockbroker's fees and other costs were subtracted.

An investment counselor's primary goal is to make you think you need his services. His secondary goes is to keep you from performing your own research to discover that is false.

roberdam 3 days ago|
never speak about investment counselors on the article, I will forward the WSJ article to my 7 year old girl so she won't be scammed by her broker (me).
dndn1 2 days ago||
Not for the same audience but for much the same idea I made a progressive visualization of saving and compound interest in a blog post about pension saving:

https://calcwithdec.dev/posts/pictures-pensions/

I intentionally didn't include numbers at all - they are a bit more effort to interpret.

A visualization might be a nice feature for kids (but it probably depends on the kid!)

wbadart 2 days ago||
OP, love the idea, and cool to see a useful PWA!

One note: I noticed when opening the installed PWA in airplane mode, styles didn't load. You might be interested in this article on PWA caching from MDN:

https://developer.mozilla.org/en-US/docs/Web/Progressive_web...

roberdam 2 days ago|
thanks for the comment & tip!, I'm going to try to make the app without external dependencies.
tictacttoe 2 days ago|
I wouldn’t want kids to grow up chasing a number. It’s just too reductionist. If you want them to be financially secure, teach them skills and the money will follow. TC obsession is a blight.
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