I discussed investors about the one principle they wished they understood earlier. Here’s the distilled wisdom.
- Start early. Time is the only irreplaceable ingredient. A dollar invested at 25 is worth far more than one invested at 35. Automate your contributions and let the exponent work.
- Volatility is not risk. Permanent capital loss is risk. A 50% loss requires a 100% gain to recover. Keep liquidity so you're never a forced seller.
- Boring is correct. If your portfolio feels exciting, you're probably gambling. Low-cost index funds, dollar-cost averaging, and patience win over time.
- Behavior > intelligence. Most mistakes come from reacting at the wrong time; panic selling, holding losers, stopping contributions. Write a plan when you're calm and follow it when you're not.
- Cut losers, let winners run. Most people do the opposite. Before adding to a losing position, ask: would I buy this today?
- Be honest about yourself. The mortgage vs. invest debate is personal. The mathematically optimal choice doesn't matter if you can't stick to it.
- Stay humble. You can't predict the market. Diversify, use index funds as your core, and admit mistakes quickly.
The bottom line:
Investing isn't about being right. It's about staying in the game long enough for compounding to work. Start early, control your behavior, and let time do the heavy lifting.
The 10-Minute Read: What I Learned from 100+ Investors
byu/mahend72 ininvesting
Posted by mahend72
3 Comments
For anyone who wants to dive deeper, the original discussion is here:
[https://www.reddit.com/r/investing/comments/1s3bgm8/whats_one_investing_principle_you_wish_you/](https://www.reddit.com/r/investing/comments/1s3bgm8/whats_one_investing_principle_you_wish_you/)
and detailed compilations is here
[What I Learned From Asking 100+ Investors About Their Biggest Mistake : r/tradingDeck1](https://www.reddit.com/r/tradingDeck1/comments/1s4gvwp/what_i_learned_from_asking_100_investors_about/)
I agree with all points, but I look at the “Keep liquidity” one and ponder. I usually like to have all my cash over my emergency funds invested asap into my indexes. But, I will say that I wish I currently had more cash to throw at META. Maybe I’ll start keeping a small cash holding in a “break in case of stupid dip” account.
Nice list. Two that I’ve also found really helpful are:
1. Diversification isn’t always better. Conviction in a few high quality investments beats quantity. More diversification often dilutes your best ideas.
2. Cheap doesn’t always mean good. Prioritize quality over price. A solid business trading at fair value is a better investment than a weak one at much more discounted price.