This is not financial advice. I’m not a professional adviser. I’m a private investor with over 20 years of experience trading and investing in markets, documenting a system I personally use to manage my own capital.
Introduction: Why I Needed a System
After more than two decades of trading and investing, I’ve learned one uncomfortable truth:
Markets don’t defeat most investors — behaviour does.
Overtrading, reacting to noise, chasing narratives, abandoning good ideas at the worst possible time — I’ve done all of it at some point. The longer I’ve been involved in markets, the clearer it’s become that the real edge isn’t intelligence or speed, but process.
This post documents the personal investment framework I now use to manage my £20,000 annual Stocks & Shares ISA allowance in the UK. My goal is simple:
- Build long-term wealth
- Reduce decision fatigue
- Avoid emotional errors
- Compound capital steadily
- And ideally, outperform the market over a full cycle
This is not about clever trades.
It’s about owning exceptional businesses and executing consistently.
My Overall Objective
I’m not trying to:
- Predict recessions
- Time market tops
- Trade headlines
- Or optimise every decimal point of return
What I am trying to do is:
- Own phenomenal compounders
- With rock-solid fundamentals
- Across a diverse but focused portfolio
- Purchased using a clear, repeatable execution plan
The core idea is straightforward:
If I can consistently buy great businesses, avoid catastrophic mistakes, and stay invested through cycles, the maths will eventually do the heavy lifting.
Why I Focus on a Stocks & Shares ISA
The Stocks & Shares ISA is one of the most powerful tools available to UK investors:
- £20,000 per year
- No capital gains tax
- No dividend tax
- No reporting burden
Over decades, the absence of tax drag is enormous.
Rather than treating the ISA as a place for speculation, I treat it as prime compounding territory. Every decision inside it is made with a multi-year (often multi-decade) mindset.
My Core Investment Philosophy
Everything in my portfolio must pass four filters:
1. Quality First
I focus on businesses with:
- High and durable returns on capital
- Strong free cash flow generation
- Proven competitive advantages
- Sensible balance sheets
No “hope” stories. No turnarounds. No hype.
2. Valuation Matters — But I’m Not Obsessed
I prefer to buy when businesses are undervalued relative to their earnings power, but I’ve learned that:
- Great companies are rarely “cheap”
- Waiting for perfection often means never owning them
So I aim for reasonable prices, with occasional opportunistic buys when markets overreact.
3. Rules Beat Feelings
I don’t trust my emotions — especially during volatility.
So I’ve built rules that govern:
- When I buy
- What I buy
- When I do nothing
The goal is to reduce discretionary decisions as much as possible.
4. Simplicity Over Precision
I don’t need perfect sizing or perfect timing.
I need a system I can follow even when markets are uncomfortable.
The Type of Businesses I Own
My portfolio is intentionally diverse but skewed toward quality and growth. It is probably more tech-heavy than the global index — by design.
Broadly, my holdings fall into these categories:
- Software and platform businesses
- Payments and financial infrastructure
- Data and information services
- High-quality consumer brands
- Industrial businesses with strong moats
- Select healthcare leaders
What these businesses share is not sector — it’s economics.
They tend to:
- Generate cash consistently
- Reinvest at high rates
- Scale efficiently
- Remain relevant through cycles
The Stocks I Hold (Core Portfolio)
At the time of writing, my portfolio includes companies such as:
- Microsoft
- Alphabet
- Meta Platforms
- Adobe
- Visa
- Mastercard
- PayPal
- Domino’s Pizza
- Costco
- Nike
- Novo Nordisk
- AstraZeneca
- Thermo Fisher
- Experian
- Copart
- Old Dominion Freight Line
- Rotork
- Spirax-Sarco
- Renishaw
- Halma
This is not a recommendation list.
It’s simply the current expression of my framework.
Over time, I plan to write individual deep dives on each holding — not to justify owning them, but to deepen my own understanding of why I continue to hold them.
How I Think About Value (Without Overcomplicating It)
I use a simplified earnings power mindset.
In practice, that means:
- Looking at normalised earnings or free cash flow
- Asking what the business earns through a cycle
- Comparing today’s price to that baseline
I’m not building complex spreadsheets or precise DCFs.
I’m ranking opportunities relative to each other.
Valuation is a tool, not a verdict.
How I Allocate New Money (The 50-Unit Concept)
Each year, I invest my ISA allowance in four quarterly instalments.
Conceptually, I treat each £5,000 contribution as:
- 50 units of £100
I use a tiered approach:
- Highest-conviction ideas get more “units”
- Expensive or satellite positions get fewer
This helps me:
- Avoid overcommitting early
- Maintain diversification
- Scale naturally over time
Because my platform only allows full-share purchases, the unit system is a guide, not a rulebook. Imperfection is built in — and accepted.
Executing in the Real World (Whole Shares, Real Constraints)
In reality:
- I can’t buy fractions
- Share prices vary wildly
- Position sizes will look messy early on
So my execution rules are simple:
- Every stock must be owned at least once before scaling
- I don’t force symmetry
- I let future contributions correct early distortions
This removes stress and avoids constant tinkering.
Buying the Dip — Without Timing the Market
I invest on a fixed quarterly schedule:
- January
- April
- July
- October
However, I’ve added a single, rules-based accelerator:
- If the broad market falls ~10%, I bring my next purchase forward
- If it falls ~20%, I may deploy two quarters
I don’t predict bottoms.
I don’t react to headlines.
I simply accelerate planned capital when prices are broadly cheaper.
This is about probability, not precision.
When I Would Ever Sell a Stock
Selling is rare.
I would only sell if something fundamental changes:
- Persistent decline in cash flow
- Erosion of competitive advantage
- Poor capital allocation
- Excessive leverage
- Or a clearly superior replacement emerges
I do not sell because:
- A stock feels expensive
- A headline is scary
- The market is volatile
Great businesses often feel uncomfortable to hold — that’s the price of compounding.
Why I’m Writing This Down
This post exists for one main reason:
To protect me from my future self.
Markets will tempt me to:
- Chase new ideas
- Abandon patience
- Break my own rules
By documenting this system clearly — and publicly — I reduce the chance I’ll deviate when it matters most.
Final Disclaimer
This is not financial advice.
I’m not a professional investor or adviser.
I’m simply a long-time market participant documenting a framework that works for me, based on my experience, temperament, and objectives.
If nothing else, I hope this encourages other investors to do the same:
- Think deeply
- Build a process
- And commit to it
Next steps
From here, I plan to:
- Publish deep dives on each individual holding
- Periodically revisit this framework to check I’m executing it — not reinventing it
- Use this as a reference whenever markets test my discipline
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