Investing mistakes are something I’ve made way too many of in my time dipping into the stock market, seriously. Like, right now I’m sitting here in my living room in Texas – it’s a chilly January morning, coffee’s gone cold because I’m scrolling through old brokerage statements again – and I’m cringing at how naive I was when I first started. Anyway, back in 2020 or whenever the pandemic hype hit, I thought I was gonna get rich quick. Spoiler: those investing mistakes cost me a chunk of change I’d rather not admit to.
Look, I’m no pro. I’m just a regular dude in the US who’s learned the hard way that new investor mistakes aren’t just stats on some site – they’re your money vanishing because you got cocky or scared. And yeah, I’ve done both. Let’s dive into the biggest ones I’ve personally bombed on, ’cause if sharing my embarrassing investing mistakes helps you avoid ’em, cool.
My Biggest Investing Mistakes: Chasing Hot Tips Without Research
The Time I YOLO’d Into Meme Stocks
One of the dumbest new investor mistakes I made? Listening to Reddit hype. Seriously, during that whole GameStop frenzy – I was in my kitchen, eating takeout tacos, phone buzzing with notifications – and I dumped a grand into it ’cause “everyone” was saying it’d moon. No research, no understanding the company. Just FOMO. It spiked, I felt like a genius for like two days, then crash. Lost half. Classic investing mistake: not doing your homework.
Experts back this up – sites like Investopedia hammer on how rookies fall for hot tips without digging in. I wish I’d read that first. Now? I force myself to read actual filings before buying anything. Boring, but it saves cash.

Emotional Rollercoaster: Another Investing Mistake I Can’t Shake
Panic Selling at the Worst Time
Ugh, this new investor mistake still haunts me. Last year, market dipped hard – I remember it was right after Thanksgiving, family drama everywhere, and my portfolio was red. I sold everything in a panic. Like, literally refreshed the app every five minutes from my couch. Bought high, sold low. Textbook.
But then it bounced back, and I missed the recovery. Forbes and CNBC call this out all the time: emotional decisions wreck returns. My take? I’m flawed, man. Sometimes I still get that gut twist when things drop, but now I have a rule: no selling for 48 hours after a freakout. Gives me time to breathe.
- Pro tip from my mess-ups: Set up auto-investments in index funds. Less temptation to tinker.
- Another: Talk it out with a friend who’s calmer than me.
Ignoring Diversification – My Laziness Led to Investing Mistakes Here
All Eggs in Tech Baskets
Early on, I was all-in on tech stocks ’cause that’s what I knew from my job. FAANG this, Tesla that. Felt smart. Then 2022 hit, rates rose, and poof – portfolio tanked. Huge investing mistake for newbies: no diversification.
NerdWallet and others scream about spreading risk, but I ignored it. Thought I was picking winners. Nope. Now I’ve got ETFs, some bonds, even a little international. Boring? Yeah. But my sleep’s better.

Forgetting Fees and Taxes: Sneaky Investing Mistakes That Add Up
Surprise Tax Bills From Impulse Trades
This one’s embarrassing. I traded a ton early on, thinking I was active and smart. Commissions were low, but short-term gains taxes? Ouch. One year, April rolled around, and I owed way more than expected. Felt like a gut punch while doing taxes in my home office, rain pounding outside.
Investopedia lists ignoring fees as a top pitfall. Me? I switched to low-cost brokers and hold longer now. Contradiction though: sometimes I still itch to trade. Human, right?
Timing the Market – The Ultimate New Investor Mistake Fantasy
Thinking I Could Predict Dips and Peaks
Ha, this investing mistake was my hubris peak. I’d watch CNBC in the mornings, coffee in hand, convinced I could buy low/sell high. Tried it with crypto too – bought Bitcoin at a “dip,” watched it dip more. Lost sleep, argued with my spouse about it.
Reality: Nobody times it perfectly. Studies show dollar-cost averaging beats it for most. That’s my go-to now. Steady contributions, no drama.
Wrapping This Up – My Investing Mistakes Taught Me Chill
Anyway, rambling over. These investing mistakes sucked, but they made me better. Raw honesty: I’m still not perfect, still check my app too much on weekends here in the US, still second-guess. But sharing this feels good, like venting to a buddy.

