What to forecast, how, and over what horizon
KnownMemorizeFour approaches: when each fits
| Approach | Fits | Avoid for |
|---|---|---|
| Historical results | stable, non-cyclical, unchanged industry; minor lines | cyclical firms (single year), restructurings, large deals |
| Base rates and convergence | young firm in established industry, many listed peers | new or changing industries, highly cyclical, the dominant leader |
| Management guidance | items management controls (costs, capex); proven record | macro-driven items (GDP, commodity prices); poor record |
| Discretionary | cyclical, few comparables, no guidance, fundamental change | views with no evidence |
Memory hook Ask what the company is: steady (history), young and ordinary (base rates), controllable and trusted (guidance), cyclical or unique (your own view).
Know it cold An industry leader cannot converge to a base rate it dominates: that is just its own history. A cyclical firm needs a mid-cycle view, not the current year.
MemorizeHorizon: four influences
Memory hook S-C-C-E: Strategy, Cycle, Company events, Employer.
Know it cold Cyclical company: forecast far enough to reach mid-cycle. Long-term manager: about 3 to 5 years; short-term manager: the next quarters.
MemorizeForecast object principles
Memory hook If the company does not report it regularly, you cannot check your forecast.
Know it cold Prefer objects disclosed regularly (or computed from them). Do not build detail you cannot verify. Summary measures: efficient but opaque. Drivers: explanatory.
Key terms
- forecast object Use it
- drivers Use it
- individual financial statement lines Know the idea
- summary measures Use it
- ad hoc forecast objects Use it
- historical results Memorize
- historical base rates and convergence Memorize
- management guidance Memorize
- discretionary forecast Memorize
- forecast horizon Use it
- mid-cycle Use it
- Drivers of statement lines Memorize subscribers and revenue per subscriber; gross margin %
- Gain explanatory value, often accuracy
- Cost more inputs to forecast and update
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- Individual statement lines Use it lines without clear drivers, or immaterial ones
- Summary measures Memorize free cash flow, earnings per share (EPS), total assets
- Gain efficiency: fewer variables
- Cost less transparent, harder to audit
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- Ad hoc objects Use it a loss or gain not yet in the accounts (legal case, disaster)
- Historical results Memorize past is precedent
- Fits stable, non-cyclical, unchanged structure; immaterial lines
- Avoid cyclical, restructuring, big acquisition
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- Historical base rates and convergence Memorize move toward a peer or industry long-run median
- Fits young or small firm in an established industry with many peers
- Avoid new or changing industries, highly cyclical, a dominant leader
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- Management guidance Memorize management targets, often a range
- Fits items management controls and has a record on
- Avoid macro-driven items; weak or promotional record
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- Discretionary forecast Memorize surveys, models, probabilities, analogies
- Fits cyclical, few comparables, no guidance, fundamental change
- Avoid when it has no evidence behind it
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- Investment strategy Memorize long-term managers 3 to 5 years; short-term managers the next quarters
- Cyclicality Memorize long enough to reach mid-cycle sales and profit
- Company events Memorize time for an acquisition or restructuring to show its effect
- Employer Use it may fix the horizon outright