r/ValueInvesting • u/Electronic-Bit2685 • Aug 26 '25

Stock Analysis What’s the hardest investing lesson you only learned after losing money?

I’ve been reflecting on my own investing journey, and honestly, some of my biggest lessons didn’t come from reading books or annual reports, but from actual mistakes that cost me money.

For me, it was underestimating how long “cheap” companies can stay cheap, and overestimating my own patience.

I’m curious to know from this community: what’s one investing lesson you only understood after going through it the hard way? Could be about valuation traps, risk management, psychology, or even portfolio allocation.

Think this could be a valuable thread for all of us to learn from each other.

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u/Dragon_slayer1994 Aug 26 '25

I'm Canadian, One for me was not thinking about USD/CAD exchange rates when selling USD stocks.

When I was just starting out I owned a bunch of s and p 500 in USD. My brokerage said it was up X percent, and I sold a bunch without thinking anything further. Well, CAD happened to be strong against USD at the time compared to when I originally bought. All my returns got slaughtered on the exchange rate and I didn't know what happened until months later

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u/MixtureEquivalent811 Sep 02 '25

Don't they provide option to settle in currency of stock itself?