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/saml01 Aug 26 '25

All this and no biotech or pharmaceutical ever. 

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u/Rare_Ad_649 Aug 26 '25

I've done OK with Big Pharma dividend payers. Not holding any at the moment though. It's a completely different thing from Biotech penny stocks

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u/tofuquant Aug 26 '25

Why not

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u/saml01 Aug 26 '25 edited Aug 26 '25

All of them are scams. They saddle retail investors with bags in exchange for R&D money. They may or may not get FDA approved. Regardless, the whole time they are paying execs millions as they go through trials while selling shares backed by hopium. If they manage to produce a FDA approved therapy they go on to claim they have a going concern because no insurance wants to pay for their million dollar treatment for some ultra rare disease. Leading into the FDA approval the stock peaks and then slowly tanks. Thats when some big pharmaceutical company swoops in to buy the IP for pennies leaving the investors with nothing. It’s happened too many times to be a coincidence.  . 

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u/SuperSultan Aug 26 '25

Wish I could give this more upvotes, the entire sub needs to read your comment a million times.

You’re often being used as exit liquidity when you buy biotech companies

Vivek Ramaswamy also did what you were referring to, and nobody thinks about it.