Stock Market Lessons

October 28, 2025 • 4 min read

Welcome to a new weekly series where I share what I’m learning as I study investing and the stock market. Some lessons come from experience. Others from research, reading, or watching the markets.

Nothing here is financial advice – just honest observations from someone still learning.

Let’s get into this week’s lessons.

Lesson 1: The Best Investment Days Are Often Unexpected

I’ve been tracking the FTSE 100 and S&P 500 daily for the past few weeks. This week, something interesting happened.

Monday: Markets opened flat. Nothing exciting. I almost didn’t check.

Tuesday: The S&P 500 jumped 1.8% in a single day.

If you’d skipped Tuesday – if you’d tried to “time the market” and stayed in cash waiting for the perfect moment – you’d have missed one of the best days of the month.

The lesson: The market’s best days often come out of nowhere. They’re not predictable. You can’t schedule them in your calendar.

Research shows that missing just the 10 best trading days over a 20-year period can cut your returns in half. That’s why “time in the market beats timing the market” isn’t just a cliché – it’s backed by data.

What I’m doing differently: Stopped trying to predict short-term movements. Started focusing on long-term holdings. Set up automatic monthly investments so I’m consistently in the market regardless of what happens on any given day.

Lesson 2: Boring Investing Usually Wins

This week I went down a rabbit hole researching different investing strategies. I looked at day trading, swing trading, options, crypto speculation – all the exciting stuff social media makes look easy.

Then I looked at the actual data.

The boring approach – buying low-cost index funds and holding long-term – beats 90% of active investors over 10+ years.

Not 51%. Not 60%. Ninety percent.

Warren Buffett has said repeatedly that most people should just buy index funds. Ray Dalio recommends index funds for most investors. Even hedge fund managers privately invest in index funds for their families.

The lesson: The investing strategies that make for exciting TikTok videos and YouTube thumbnails usually underperform the “boring” approach of buying diversified index funds and waiting.

Excitement in investing often correlates with lower returns and higher stress.

What I’m doing differently: Stopped chasing the exciting stuff. Started appreciating boring. Put 80% of my portfolio in index funds (Vanguard FTSE Global All Cap). Saved the remaining 20% for individual stocks I’ve actually researched.

Lesson 3: Reading Annual Reports Is Actually Useful (And Not That Boring)

I forced myself to read my first company annual report this week. I chose Tesco because I shop there and understand the business.

I expected it to be mind-numbingly dull.

It wasn’t.

Sure, parts were dry. But I learned SO much:

How Tesco actually makes money (margin of just 3-4% on groceries!)
Where they’re investing (technology, online delivery)
Their debt levels (reasonable)
Management’s strategy (clear and sensible)
Risks they face (competition from discounters, economic downturn)

After reading it, I understood why Tesco trades at its current valuation. I could make an informed decision about whether to invest.

The lesson: Annual reports aren’t as boring as everyone says. They’re actually goldmines of information. If you can’t understand a company’s annual report, you probably shouldn’t invest in that company.

You don’t need to read every page. Focus on:

Revenue and profit trends
Debt levels
Cash flow
Management’s commentary
Risk factors

What I’m doing differently: Before buying any individual stock, I now commit to reading at least the highlights of the most recent annual report. Takes 30-60 minutes. Worth it.

You can find annual reports on company investor relations websites or Companies House for UK firms.

Lesson 4: My Emotions Are Not My Friend

Full transparency: I made a mistake this week.

I was watching a stock I’d been researching (won’t name it to avoid influencing anyone). The price had been hovering around £15 for weeks.

Wednesday morning, it jumped to £16.50. I panicked, thinking “I’m missing out!” and bought shares at £16.40.

By Friday, it was back to £15.20.

I bought near the top because I let FOMO (fear of missing out) drive my decision. Classic emotional investing mistake.

The lesson: Your emotions – fear, greed, excitement, panic – are terrible investment advisors. They push you to buy high (when everyone’s excited) and sell low (when everyone’s scared).

The best investors aren’t smarter. They’re just better at controlling their emotions.

What I’m doing differently:

Created an investment checklist I must complete before buying anything
Wait 24 hours between “I want to buy this” and actually buying
Remind myself that if it’s a good company, it’ll still be a good company tomorrow, next week, or next month
Accept that I’ll never buy at the perfect price – and that’s okay

For UK investors, learn more about managing emotions in my guide: Understanding Risk and Strategy

Lesson 5: Dividends Are Real Money

This one’s simple but it struck me this week.

I hold a small position in a dividend-paying stock. This week, £8.47 appeared in my brokerage account. Not much. But real money I didn’t work for.

That £8.47 came from owning shares in a company that made profit and decided to share some with shareholders.

Scale that up: If someone owns £50,000 worth of stocks paying 3% dividends, that’s £1,500 per year. Every year. Just for owning the shares. Whether they check the stock price daily or ignore it entirely.

The lesson: Dividends are one of the most underrated parts of investing. They’re not as sexy as 100% gains or meme stocks, but they’re reliable, compound over time, and genuinely passive income.

For UK investors, dividends up to £500 per year are tax-free (dividend allowance 2024/25). After that, you pay dividend tax, but it’s still a powerful wealth-building tool.

What I’m doing differently: Started paying more attention to dividend stocks as part of a balanced portfolio. Not solely chasing high yields (that can be a trap), but appreciating companies that share profits with owners.

What I’m Reading This Week

Book: The Intelligent Investor by Benjamin Graham (chapter 8 on market fluctuations – mind-blowing)

Article: This piece on compound interest from Vanguard really drove home why starting early matters so much

Tool I’m Using: Our Investment Calculator to visualize different scenarios – seeing £100/month turn into £100k+ over 30 years is powerful

Your Turn

What did you learn about investing this week? Any mistakes? Any “aha” moments?

Reply to our newsletter or find me on social media – I’d genuinely love to hear your experiences.

Next week: I’m diving into why some investors love crypto while others think it’s a terrible idea. Should be interesting.

Keep Learning

What is a Stock? A Beginner’s Guide – Start with the fundamentals
How to Buy Your First Stock – Ready to invest? Here’s how
Understanding Risk and Strategy – Manage emotions and build a plan
Investment Calculator – See how your money could grow
https://am.jpmorgan.com/us/en/asset-management/adv/insights/market-insights/guide-to-the-markets/

Disclaimer: This is educational content sharing personal learning experiences, not financial advice. I’m not a qualified financial advisor. All investing carries risk, including loss of principal. Always do your own research and consider consulting a qualified financial advisor before making investment decisions.