The Top-Down Process: Step by Step
Step 1: Where Are We in the Economic Cycle?
The economic cycle drives sector rotation — the systematic movement of capital between sectors as the economy moves through its phases. Professional fund managers spend considerable effort estimating the current phase of the cycle and positioning their sector weights accordingly:
| Cycle Phase | Characteristics | Favoured Sectors | Avoid |
|---|
| Early Expansion | Rising GDP, low rates, unemployment falling | Financials, Consumer Discretionary, Industrials | Utilities, Staples |
| Mid Expansion | Strong growth, rising earnings, moderate rates | Technology, Materials, Energy | Defensive sectors |
| Late Cycle / Peak | Slowing growth, rising rates, tight labour | Energy, Healthcare, Consumer Staples | Rate-sensitive sectors |
| Recession | Falling GDP, rising unemployment, rate cuts beginning | Healthcare, Utilities, Staples, Gold | Cyclicals, banks, discretionary |
| Early Recovery | Stimulus effects, rates low, confidence returning | Financials, Cyclicals, Real Estate | Defensives (now expensive) |
The UK economy as of mid-2026 shows characteristics of a mid-to-late cycle expansion: GDP growth moderating from post-pandemic peaks, Bank of England rate cuts underway but cautiously, labour market tight, corporate earnings still growing but margins beginning to compress in some sectors. Professional fund managers have been tilting toward quality-defensive and energy sectors while reducing exposure to rate-sensitive and highly leveraged businesses.
Step 2: Regional Allocation
Within a global portfolio, which geographies offer the best risk-adjusted return prospects? Professional fund managers consider:
- Valuations: UK equities trade at a persistent discount to US equities — FTSE 100 P/E approximately 12-13x versus S&P 500 at 20-22x as of mid-2026. This valuation gap represents either a genuine opportunity or a structural discount for good reasons (sector composition, governance, liquidity).
- Growth outlook: Which economies have the best GDP growth prospects over the next 1-3 years? Emerging markets may offer higher growth but at higher political and currency risk.
- Currency: A UK investor's returns from international holdings are affected by GBP/USD and GBP/EUR movements. Currency risk must be considered, especially for concentrated international positions.
- Political and regulatory stability: Geopolitical risk, regulatory change, and policy uncertainty all affect the appropriate discount rate for different regional markets.
Step 3: Sector Selection
Within your chosen regional allocation, which sectors are most attractive given the macro backdrop and relative valuations? This is where the cycle analysis from Step 1 feeds directly into portfolio construction.
Sector selection is not just about absolute value — it is about relative value and positioning. A sector that looks absolutely cheap but is facing structural headwinds (retail property, print media, traditional banking in certain markets) is often a value trap. You want sectors that are:
- Aligned with the economic cycle phase
- Trading at below-average valuations relative to their own history
- Showing positive earnings revision momentum (analysts upgrading, not downgrading)
- Not facing near-term regulatory or structural disruption
Step 4: Individual Stock Selection
Only once you have a macro view (Step 1), a regional allocation (Step 2), and sector preferences (Step 3) do professional fund managers focus on individual stocks. Within each preferred sector, they use quantitative screening (like Fintiq's Fundamental Screener) to identify the highest-quality companies trading at the most attractive valuations.
The combination is powerful: you are not just buying a quality company at a fair price. You are buying a quality company at a fair price in a sector that is well-positioned given the macro environment. You have the macro wind, the sector wind, and the stock-specific quality all working in your favour simultaneously.
The sector-stock interaction: Research shows that sector selection explains approximately 40% of active fund return differences. Stock selection explains approximately 60%. A great stock in the wrong sector (excellent pharmaceutical company in a market where biotech is being sold off due to macro rotation) will underperform its fundamental value for extended periods. Buying the right stocks in the right sectors dramatically improves the risk-return profile.
How Professional Fund Managers Use Quantitative Screens
A common misconception is that professional fund managers analyse every company manually from scratch. In reality, they use quantitative screens extensively to narrow their investable universe before applying deep fundamental analysis.
A typical professional screening workflow for a UK equity fund:
- Universe definition: FTSE 350 (Large and Mid-Cap), or FTSE All-Share including small-caps, or a global universe. The universe is defined before any other filter.
- Liquidity filter: Minimum daily trading volume. For a large fund, positions must be large enough to be meaningful but not so large relative to daily volume that building or exiting the position would move the market significantly.
- Sector filter: Based on the macro and sector analysis from Steps 1-3 above, the universe is narrowed to the preferred sectors only.
- Quality screen: ROE above sector average, debt/equity below sector average, positive FCF, margin above sector median. This eliminates low-quality businesses regardless of valuation.
- Valuation screen: P/E below sector average or below the company's own 5-year average, EV/EBITDA below 12x, price/FCF below 15x. This eliminates expensive stocks regardless of quality.
- Momentum filter: 6-month relative strength versus sector above 0 (i.e., the stock has been outperforming its sector peers recently). This avoids stocks that are cheap for a reason that the market is already pricing in.
The result of this multi-step filter is a shortlist of 10-20 companies that are high quality, reasonably valued, and showing positive momentum within preferred sectors. The analyst then applies deep fundamental research to this shortlist to select the final portfolio positions.
The Position Sizing Principle
One of the most consequential and least discussed aspects of professional portfolio construction is position sizing: how much capital to allocate to each idea. Professional fund managers apply a systematic approach:
Position Sizing Framework:
High-conviction ideas: 5% - 8% of portfolio
(Strong fundamental case, attractive valuation, positive momentum,
proven management, clear catalyst for value realisation)
Moderate-conviction ideas: 2% - 4% of portfolio
(Good case but one or more uncertainties: newer management team,
regulatory uncertainty, execution risk, limited historical data)
Diversifying/satellite ideas: 0.5% - 2% of portfolio
(Interesting optionality or diversification benefit but insufficient
conviction for larger allocation; small enough to not matter if wrong)
Maximum single stock: 10% (rarely exceeded by professional funds)
Maximum single sector: 25-35% (sector concentration limit)
Minimum meaningful position: 0.5% (below this, the position cannot
materially affect portfolio returns)
The key principle is that your conviction in an idea should determine its weight. A portfolio where every position is equal-weighted is implicitly claiming equal conviction in every idea — which is almost never true. If you believe AstraZeneca is deeply undervalued with multiple near-term catalysts and Barclays is a reasonable holding with no particular catalyst, they should not have identical weights.