2024 marks the 20 year anniversary of Dr. Dahle's first real investments made late in intern year. He's a little older and hopefully a little wiser, but these core principles have remained true in the last two decades.
There are many roads to Dublin.
There are hundreds of reasonable ways to invest. Just pick one and stay with it.
Index funds work because they have to.
It's just math and it always works. It doesn't work because the market is efficient (although it is efficient enough that the right move is to act as if it is perfectly efficient). It works because costs matter.
Stay the course.
Investing can be simple, but it's not easy. It's not easy because it takes time and you have to stick with your plan for a long period of time no matter what happens, and that's hard for humans.
Diversify.
Diversification protects you from what you don't know and what you can't know. Being diversified means always being unhappy with something in your portfolio.
Earning and saving matters.
In fact, it matters more than your investments. Most of America (and the world) has an income problem. People dramatically overestimate the difficulty of doubling their income. People also suck at saving money. The secret to having large investment accounts is putting a lot of money in there.
Individual stock investing is a bad idea.
If the professional active fund managers can't beat the market before their costs and taxes, what makes you think you can? Don't you have something better to do with your time than lose your hard earned savings picking stocks?
Avoid speculative investments.
If it doesn't pay interest, have earnings, or generate rents, it is by definition speculative. That doesn't mean you can't make money with it, but it's far closer to gambling than investing. If you can't resist it all together, at least limit how much you put into these "investments."
Market timing doesn't work long-term.
If it was as easy as you think it is, everyone would be doing it successfully. It turns out that everyone's crystal ball is cloudy.
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