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Posted by roberdam 4 days ago

Show HN: In a single HTML file, an app to encourage my children to invest(roberdam.com)
246 points | 431 commentspage 4
swalsh 4 days ago|
Where can I find this 15% annual interest rate?
triceratops 4 days ago||
Become OP's kid.
roberdam 4 days ago||
open to adoptions :P
roberdam 4 days ago|||
sample= 14.5% on local currency, https://www.bolsadevalores.com.py/nuevas-emisiones/investiga...
philipwhiuk 4 days ago||
In a country with high inflation
wiseowise 3 days ago||
You forgot to add taxes, market crashes, sanctions, asset depreciation, companies goes bankrupt and other fun things.
FredPret 3 days ago||
Love this.

Especially the opening line:

"“What comes with the milk, leaves with the soul” — Russian proverb."

I love a good proverb. This one goes hard.

didip 4 days ago||
Good. Financial education is sorely needed for everyone in America.

Now if only there’s an app that can teach delayed gratification.

fodkodrasz 4 days ago||
But how do you charge the phone?
roberdam 4 days ago|
disabling wifi+data extend a lot the battery
fodkodrasz 4 days ago||
The screen is the biggest consumer imho.

I mean of course I understand that the phone can be removed by the suction mount, but thus also defeats the idle infotainment concept.

Also seen screen burn in...

roberdam 4 days ago||
locked by default, unlock when you want to check your balance.
internet_points 4 days ago||
is 15% realistic?
loloquwowndueo 4 days ago||
Not in real-life terms, but for a kid, a larger interest rate will be less slow and boring than a realistic one, and it will be more engaging.

“The first national bank of dad” is a book that suggests a similar approach and I believe it also advocates a 15% interest rate.

Esophagus4 4 days ago||
I remember watching the statements for my savings account as a kid and getting like 2¢ of interest per statement and thinking… that’s it?? Why bother??
xnx 4 days ago|||
No. Since the late 1920s, US stocks have yielded an average real annual return of about 7%.
Sammi 4 days ago||
Source: "Since 1957, the S&P 500 has delivered an average annual return of 10.54%, but when adjusted for inflation, the real return drops to 6.68%."

https://www.investopedia.com/ask/answers/042415/what-average...

And on top of that there's huuuuuuuuge variance over time. You have to scale in and out of the market over a very long time to actually get the ~7%. Any one time investment is just a straight up gamble. It's only in aggregate over a long time that you get something somewhat reliable. But then the numbers aren't that impressive. I understand why people are so fond of buying bigger or second houses instead. It's a shame because it drives up the price of housing making it less available for our young. We're basically saving for our future by robbing the future of our young. It's pretty dark to be honest.

Esophagus4 4 days ago||
Yes, the trick with houses is that it’s the only chance most retail can get 5:1 leverage. Your brokerage will never extend that to you to invest in equities.

But without leverage, long run return of residential real estate is like 3% after costs, which is less than equities but above bonds.

At least that’s what I tell myself as I go to sleep in my apartment, a non-homeowner watching people accumulate serious paper gains in their houses ;(

Source: a paper called the real return on everything.

zipy124 4 days ago||
Leverage comes with a cost though through interest rates. It is entirely possible (and even typical) to come out with a loss even on appreciating real estate, since your house must appreciate by more than the interest on your loan. In the UK at-least you can get 1:5 leverage on equities, but you'd be looking at a 20-25% APR, instead of the 5% mortage.

The paper "the real return on everything" notably cuts off in 2010 and is talking about global averages, if you narrow it down to specific countries we can see stark differences. In the USA and UK you get 8.4% and 7.2% returns on equity, but only 6.03% and 5.36% returns on housing, a stark difference. Adding in mortage leverage adds on about a percent or so of return, thus still not bringing housing in-line with equities.

If we narrow our window to post 1980, we see in the UK returns of 9.34, 6.81 and 6.67 % for equity, housing and bonds. If we look at post 2010 in the uk, house prices have only stayed the same or decreased in real terms since then in the uk for instance, whilst equities have soared.

They also in the paper assume bond yields are roughly the same as mortage interest rates, which maybe was true for their data period, but hasn't been true since 2010 (https://www.housepricecrash.co.uk/forum/uploads/monthly_2022...)

Finally you can diversify equities globally, you cannot diversify your housing globally (if using leverage in a mortage).

Esophagus4 3 days ago||
Good points! And the period since 2010 has been mostly up and to the right.

While the housing market as a whole may go up, the likelihood that any individual house will go up probably varies more.

How do you get that much leverage from a brokerage to invest in equities? In the US we have something called Reg T, which basically says brokerages can only lend at 2:1 against securities in most cases.

Even most leveraged ETFs will generally stop at 3X.

roberdam 4 days ago|||
11% is a safe interest rate on my country (py), I just got a 14.5% offer for local bonds BBB+
philipwhiuk 4 days ago||
It's less surprising Paraguay has 14.5% interest rates when you realise there's persistent 4% inflation (spiking to 11% in 2022).

Effective interest rate is something like 7-10%

normie3000 4 days ago|||
Yes, in Brasil and South Sudan: https://en.wikipedia.org/wiki/List_of_countries_by_central_b...
dlisboa 4 days ago|||
Those two aren't similar. Brazil's annual inflation is 4-5%, you get 10% real return. South Sudan is 74% against your 15% return: you lose money.
elAhmo 4 days ago|||
So, not really.
singpolyma3 4 days ago|||
/me looks at market gains for 2025
thelastgallon 4 days ago||
87% in Argentina.
latexr 4 days ago||
This is frankly depressing.

> As my eldest son’s birthday was approaching, we suggested that instead of asking for physical gifts, he ask for their equivalent in money. That way, he gathered a decent amount of capital for his first investment adventure.

Yes, why would you want a toy or a book? Why waste time having fun or learning? You could instead watch a number go up slowly while you do nothing. Fun for the whole family, seconds at a time!

> Each day, as they watch their small fund grow, they grasp the magic of compound interest — and that, more than any gift, is a lesson I hope will stay with them for life.

This feels like raising finance dude bros and gambling addicts. There is no “magic” to compound interest, no one should have “watch money accumulate” as a life goal.

kaggie 4 days ago||
Okay thank goodness I’m not the only one who finds this incredibly sad. Especially as someone who is trying to make money less important in my life.
nxor 4 days ago||
In what way are you doing that? Not that I disagree just curious how
kaggie 3 days ago|||
All I mean by that is having an honest job I don’t totally dread, not getting a high-paying job that wrecks my mental health solely because it pays a lot, buying only what I need with minimal wants, trying to live simply without extravagance. I do in fact track budgeting very consistently and have a 401K, among other things, so that I avoid homelessness and stuff. But I do not think about how to make more and more money constantly.
exitb 4 days ago||||
The simple way would be to not "manage" your finances, don't build an investment portfolio. Have an honest work, live happily within your means and save whatever's left in cash.
nxor 4 days ago|||
Sadly, honest work is a dying value.
UK-Al05 4 days ago|||
I don't think you understand. In the US you have to invest, or you simply won't retire before you die.
GCUMstlyHarmls 4 days ago|||
By earning more.
nxor 4 days ago|||
Kids used to be encouraged to work hard and to learn. Every day I realize that some kids are not raised with this idea. Why work hard when others can, and you'll get even richer? Learning schmearning
roberdam 4 days ago|||
Kids are 7 and 10 , this is a mini "Marshmallow Test" and they can use their money whenever they want if they find a book or toy they like while they learn how investments work.
nxor 4 days ago||
Or they could work for money when they are old enough to
pickleglitch 4 days ago|||
He's teaching them the most important lesson of living in a capitalist system: wealth comes from having money, not from earning money.
exitb 4 days ago|||
If he's not able to also provide them with a sizeable initial capital, this lesson is also completely irrelevant. No one becomes really wealthy by investing savings off their modest salary.
triceratops 3 days ago|||
You can, however, get wealthy by investing savings off a good salary.
UK-Al05 4 days ago|||
I mean you can literally do that. And get wealthly. It'll just be a meagre existence up and until retirement.
SirMaster 4 days ago|||
It's better to invest in assets though than just the stock market. The wealthy build wealth by borrowing and buying assets like real estate. This ways makes it easier to avoid income taxes and capital gains taxes and you also get massive tax deductions for asset deprecation that you can use to offset most or all of what income it does provide.
rusty__ 4 days ago|||
agreed - he doesn't say the age of the kids but I imagine they're both under 10? Done right this could set them up for life and make them millionaires with virtually no effort by the age of 30 and still give them a childhood filled with toys and fun. But removing birthday gifts entirely from a young child... woah. Kids need physical items and tangible hobbies to share and bond with friends, even if it's just a cool looking stick. Is a child's brain developed enough to understand, enjoy and share a lot of these concepts, could it maybe lead to them becoming isolated?
floundy 4 days ago||
>Done right this could set them up for life and make them millionaires with virtually no effort by the age of 30

This seems hyperbolic. Given that money doubles in roughly 10 years at a 10% rate of return, if kiddos are 10 years old they get two doublings by 30. To be a millionaire by 30 requires a present value investment of $250k per child.

codedokode 4 days ago||
You should take inflation into consideration, so the million in 20 years won't be the same as now.
floundy 4 days ago||
It’s been my experience that when people are talking about some future sum of money without specifying real or nominal they are referring to a real sum, based on their current day concept of monetary value.
ascendantlogic 4 days ago|||
How is teaching your kids to invest some portion of their money "raising finance due bros and gambling addicts"? Just because modern culture has incentivized these kinds of people doesn't suddenly make investing bad. This is such a wild take.
latexr 4 days ago|||
> How is teaching your kids to invest some portion of their money

That’s not what the article says. I explicitly quoted the relevant part. It’s not “a portion of their money”, this is not money they had lying around in an envelope that grandma gave them. This father is incentivising the kids to not get what they want for their birthday and instead ask for money with which they’ll do nothing but unrealistically watch grow for a period of time. That’s not a good core memory, no one looks fondly on “that birthday I had as a kid where I got nothing but a number on an app stated growing at a snail pace”.

> doesn't suddenly make investing bad.

That’s not the argument. Nowhere in my comment does it say investing is bad.

> This is such a wild take.

Any take is wild when you blatantly misrepresent it. Don’t straw man.

roberdam 4 days ago|||
Kids are 7 and 10 , this is a mini "Marshmallow Test" and they can use their money whenever they want if they find a book or toy they like while they learn how investments work.
B56b 2 days ago||
Seems more like a "mega" Marshmallow Test. Instead of putting off a snack for 15 minutes they're giving up an entire year of birthday gifts for a reward years into the future.
macNchz 4 days ago|||
I dunno, while they didn’t tell me to ask for cash, my parents basically made me invest any cash I got as gifts, plus everything I earned at summer jobs. I think that this kind of “investing by default” mindset (plus getting my own desktop computer for Christmas at age 11) extremely significantly impacted my current life in a positive way.

Also, learning to use Excel by playing fantasy stocks during the dot-com bubble, and having a Lycos homepage “Portfolio” widget just like my mom did is a fond memory for me, and zero people on Earth would call me a finance bro today.

latexr 4 days ago||
The major difference is that in all your examples you were already getting cash. In the article, the poster is incentivising their kids to get cash instead of something else specific. From the article:

> we suggested that instead of asking for physical gifts, he ask for their equivalent in money.

For their equivalent. In other words, the kid has to decide something they want then deliberately choose to not get it so they can “invest” it and see line go up.

It would’ve been different if this had instead been a case of “grandma just gave you an envelope with cash; if you don’t have plans for it, how about investing?”. Which works on many levels, they could’ve also spent some portion of the money on something they wanted then invested the surplus, or a myriad other options.

nxor 4 days ago|||
Investing isn't bad? Sure we all do it but how isn't it bad?
mpalmer 4 days ago||
> Why waste time having fun or learning?

yeah definitely no learning happening here

> You could instead watch a number go up slowly while you do nothing.

and then...spend it on something nice?

> This feels like raising finance dude bros and gambling addicts.

This is a super reactive take speaking from no experience whatsoever. My own parents did something like this for us when we were in elementary/middle school and it taught me restraint in spending, not the opposite.

latexr 4 days ago||
> This is a super reactive take speaking from no experience whatsoever.

You have no idea what my experience is, please don’t assume.

> My own parents did something like this for us when we were in elementary/middle school and it taught me restraint in spending, not the opposite.

I’m glad it worked out for you. Truly. But don’t assume your experience is universal, because I unfortunately know for a fact it’s not. Also, the argument isn’t that it causes unrestrained spending, that’s not what financial dude bros are about. Excessive restraint in spending can also lead to unhappiness and an unhealthy attachment to money.

Mr_Bees69 3 days ago||
you need to add the meta utf8 tag
roberdam 3 days ago|
thanks for the tip!, added.
cluckindan 4 days ago||
Wait until they want to divest their portfolio and start hyping meme stocks and shitcoins because number go up faster.

Then orchestrate an artificial bubble and crash

ascendantlogic 4 days ago|
What's the point of this comment? To discourage investing? Reddit-style shitposting? Not sure what you're going for here.
barbazoo 4 days ago|||
That comment is spot on and in my opinion completely in the spirit of the post. It is all about number go up and competition.
wiseowise 3 days ago||||
Investing is not a safe piggy bank where you add coin and see green numbers go up.
brazukadev 4 days ago||||
What is the point of your comment, actually? At least GP is talking about children psychology and is totally on topic. Wanting a faster profit then getting scammed or lose money in a crash market is also part of the learning.
dbbr 4 days ago|||
It's for the lolz. I laughed and upvoted, just imagining my kids someday lecturing me on crypto. Then I thought about creating a bubble for them and then saying to their faces "Annnnnd it's gone."
ho_schi 4 days ago|
At the point with investment I was lost. Children should learn to be patient (saving money) and prepare for bad situations (saving money). That’s enough.

When older we can teach them what capitalism considers as investment. Capitalism is a longer word for greed. Money doesn’t work. Employees do. Customers pay. Both suffer to make greedy persons rich.

Give them a piggy bank. Teaches the concept of preparation.

kmijyiyxfbklao 3 days ago||
Even saving can be seen as greed. Someone can focus too much on accumulating for themselves. Both investing and saving can be seen as preparation.

To avoid things becoming evil, you just need to make sure that your interactions with other are cooperative and not zero sum, and not all investments are zero sum.

kccqzy 3 days ago|||
You say "when older we can teach them what capitalism considers as investment" but you never specify the age. What exactly counts as older? My mom started telling me about how the new home we just moved into was both a place to live and also an investment at age 8. My dad started telling me about his brokerage account when I was 7. My dad also explained to me why the new car we just bought was not an investment when I was 6.

That's to say, I strongly disagree. It's almost never too early to teach this to children. As soon as children know money could be spent on exchange for things, they should begin to think about how money is made.

nxor 4 days ago|||
I mostly agree but greed is a part of human nature is it not?
array_key_first 3 days ago|||
I don't know, is it? It seems natural - after all, animals are selfish and will put themselves first to survive.

... but then again, animals also rape and murder each other. Is rape a part of human nature? I don't know, but I know we don't want it.

Jaxan 4 days ago||||
People keep repeating this. But why is it people’s nature. Maybe it is learned, because everyone keeps repeating this phrase!
ho_schi 3 days ago|||
Capitalism itself is a rather modern idea around 1800. And greed is maybe rooted in human nature, within the need to keep a buffer of food.

But we’ve brains and are social entities. I don’t think greed is necessity. But greed of other harm our needs. And we need to get greedy to get enough?

Examples: I want a nice bicycle. I need small house or nice flat. I enjoy good food from time to. I’m rather sure I don’t need a super-yacht, no swimming pool and no villa. I think stuff which I cannot keep myself clean is too much. If I cannot keep it clean myself it was greed?

But we’ve big dreams?

For the big dreams I would probably consider a cooperative society. These airliners are so expensive and suffer from not being used. Sharing them would be nice? Like…like owning airline stocks. Without the enforcement to gain money. Maybe some people enjoy flying it around, other maintaining it and others care about safety and passengers. Others maybe want fly to the moon. And others enjoy ships. Maybe sharing them deliberately makes sense?

triceratops 3 days ago||
> Money doesn’t work. Employees do. Customers pay. Both suffer to make greedy persons rich.

I don't want to work until I'm dead. If that makes me greedy, so be it.

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