Risk vs Uncertainty - Understanding the Difference
🎲 Risk vs Uncertainty - Understanding the Difference
Risk and uncertainty are often used interchangeably but mean fundamentally different things. Risk is measurable - you can calculate probabilities and outcomes (rolling dice, insurance). Uncertainty is immeasurable - unknown unknowns where you can't even calculate probabilities (pandemics, technological disruption, black swan events). Understanding this distinction helps make better financial decisions: manage risks through diversification and insurance, but prepare for uncertainty through resilience, flexibility, and buffers.
What Is Risk?
Definition of Risk:
Risk is variation in outcomes where probabilities are known or estimable. You can measure, calculate, and quantify risk using historical data and mathematical models.
Characteristics of Risk:
- Measurable: Can calculate probabilities
- Known outcomes: Possible results are defined
- Historical data exists: Past provides guide
- Can be priced: Insurance premiums, investment returns
- Manageable: Diversification, hedging, insurance
Examples of Risk:
1. Dice roll:
- Known outcomes: 1, 2, 3, 4, 5, 6
- Known probabilities: 1/6 (16.67%) each
- Perfect measurable risk
2. Car insurance:
- Insurance companies have actuarial tables
- Know accident rates by age, location, vehicle type
- Can calculate expected claims
- Set premiums accordingly
3. Investment returns:
- Historical stock market returns: ~7-10% annually
- Standard deviation: ~15-20% (volatility)
- Can estimate likely range of returns
- Not certain, but probabilistic
What Is Uncertainty?
Definition of Uncertainty:
Uncertainty is situations where not only outcomes but probabilities themselves are unknown. You don't know what you don't know - true "black swans."
Characteristics of Uncertainty:
- Immeasurable: Cannot calculate probabilities
- Unknown outcomes: Don't know full range of possibilities
- No historical precedent: Never happened before
- Cannot be priced: Insurance unavailable or inadequate
- Requires resilience: Must absorb shocks, adapt
Examples of Uncertainty:
1. COVID-19 pandemic (2020):
- No one predicted timing, spread, severity
- No historical data on global lockdowns
- Economic impact unknowable in advance
- Changed work, travel, behaviour unexpectedly
2. Technological disruption:
- Uber/Lyft upended taxi industry
- No historical data predicted this
- Taxi medallion owners lost massive value overnight
- Similar: Netflix vs Blockbuster, Amazon vs retail
3. Personal health crisis:
- Serious illness diagnosis
- No way to predict when or if
- Can't calculate probability for individual
- Insurance helps but can't eliminate impact
Key Quote:
"Risk is like poker where you know the odds. Uncertainty is like poker where you don't even know all the cards in the deck."
📈 Markets, Property, and Income
Why Markets Can Be Measured but Not Predicted
Market Risk (Measurable):
- Historical returns: NZ shares averaged 7-9% annually over decades
- Volatility: Standard deviation ~15-20%
- Can estimate: 95% of years returns between -10% and +30%
- This is measurable risk - variation around known mean
Market Uncertainty (Immeasurable):
- 1987 crash: 20%+ decline in single day (no warning)
- GFC 2008: 50%+ decline (few predicted timing/severity)
- COVID crash 2020: 35% decline in weeks
- These are uncertainty - unpredictable black swans
How Investors Handle Both:
For risk (measurable volatility):
- Diversification across companies, sectors, countries
- Long investment horizon (time reduces impact of volatility)
- Asset allocation based on risk tolerance
For uncertainty (black swans):
- Never invest money needed in next 5 years
- Maintain emergency fund separate from investments
- Don't use leverage (borrowed money) - amplifies losses
- Accept that crashes will happen but timing unknowable
Property Market Example
Property Risk (Measurable):
- Historical Auckland house price growth: ~7% annually long-term
- Year-to-year variation: Some years +15%, others -5%
- Can measure this volatility
- Rental yields: 3-5% historically
Property Uncertainty (Immeasurable):
- Wellington earthquake: No one knows when, but could devastate values overnight
- Government policy changes: Tax law changes, zoning, subsidies - unpredictable
- Economic shocks: Global recession, pandemic affecting demand
- Neighbourhood changes: Infrastructure, demographics shifts
Practical Implications:
Managing risk:
- Diversify: Don't put all wealth in one property
- Insurance: Covers fire, earthquake (partially)
- Location research: Understand local market trends
Managing uncertainty:
- Don't over-leverage: Keep loan-to-value reasonable
- Buffer in budget: Don't max out what bank will lend
- Alternative plans: Can you afford if must sell? Rent out?
- Accept: Cannot predict earthquakes, policy changes
Personal Income Risk and Uncertainty
Employee Income:
Risk (measurable):
- Redundancy/layoff probability: ~5% annually (varies by industry)
- Average time to find new job: 3-6 months
- Salary progression: Predictable based on experience
Uncertainty (immeasurable):
- Company bankruptcy (employer disappears)
- Industry disruption (entire sector becomes obsolete)
- Health issues preventing work
- Skill obsolescence from technology
Self-Employed/Contractor Income:
Higher uncertainty:
- Client loss: Can happen anytime, any reason
- Market downturns: Discretionary spending cut first
- Competition: New entrants, price pressure
- Regulatory changes: Affect business viability
- Personal factors: Illness, burnout, life changes
Example: IT contractor
- Risk: Some months busy, others slower (measurable seasonal pattern)
- Uncertainty: Major client suddenly terminates contract, pandemic stops all contracts, new technology makes skills obsolete
🛡️ Protection Strategies and NZ Scenario
How to Protect Against Uncertainty
1. Emergency Fund (Critical):
- Purpose: Buffer against unknowable events
- Amount: 6-12 months essential expenses
- Employees: 3-6 months often sufficient
- Self-employed: 6-12 months recommended (higher uncertainty)
- Location: High-interest savings (accessible, not invested)
2. Diversification:
- Income sources: Don't rely on single employer/client
- Investments: Spread across asset classes, countries
- Skills: Develop multiple revenue-generating abilities
- Relationships: Network across industries
3. Conservative Debt Levels:
- Fixed expenses (mortgage, loans) create rigidity
- High debt = vulnerable to income shocks
- Keep debt serviceability comfortable not maximal
- Don't borrow assuming best-case scenarios
4. Skills and Adaptability:
- Continuous learning (technology, market changes)
- Transferable skills valuable across industries
- Network maintenance (opportunities come through people)
- Side projects/income streams (test alternatives)
5. Insurance (Covers Some Uncertainty):
- Health/medical insurance
- Income protection (if ill/injured)
- Life insurance (family protection)
- Property insurance (earthquake, fire)
- Limitation: Only covers defined events, not all uncertainty
6. Avoid Concentration:
- Single employer (job loss = 100% income loss)
- Single property (all wealth in one asset)
- Single investment (company bankruptcy)
- Single country (geopolitical risk)
NZ Scenario: Mike, Self-Employed Contractor
Background (Pre-COVID):
- Mike: 38, IT contractor in Auckland
- Income: $120,000/year ($10,000/month average)
- Steady work 2015-2019 (5 years of reliability)
- Lifestyle: $7,000/month expenses
- Mortgage: $450,000 ($2,500/month)
- Savings: $15,000 emergency fund
Mike's Risk Assessment (Pre-COVID):
- Felt secure - 5 years consistent work
- Multiple clients (3 main, several small)
- Emergency fund = ~2 months expenses
- Thought: "This is manageable risk"
March 2020 - Uncertainty Strikes:
- COVID-19 lockdown announced
- All 3 main clients pause contracts immediately
- Small clients cancel projects
- Income drops from $10k/month to $500/month (near zero)
Mike's Situation:
- Fixed expenses: $7,000/month continue
- Emergency fund: $15,000 = 2 months only
- No "slow decline" to adjust - immediate stop
- This was uncertainty, not risk (couldn't have predicted/measured)
Mike's Actions:
- Month 1: Used emergency fund, applied for wage subsidy
- Month 2: Mortgage holiday (6 months available), cut non-essential spending
- Month 3-6: Took any work available (much lower rates), applied for permanent roles
- Month 7: Accepted permanent job at $95k (lower than contracting but stable)
What Mike Learned:
Mistook uncertainty for risk:
- Thought income variation was risk (sometimes $8k, sometimes $12k month)
- Measured this and felt comfortable
- Didn't consider uncertainty (income could go to zero)
Insufficient buffer:
- 2-month emergency fund inadequate for true uncertainty
- Self-employed needs 6-12 months (learned hard way)
- Fixed high expenses (mortgage) created vulnerability
Concentration risk:
- All income from contracting (no side income)
- All clients in same sector (all cut spending simultaneously)
- Should have maintained diverse income sources
Mike's New Approach (Post-COVID):
- Permanent job provides base income ($95k)
- Building 12-month emergency fund (~$70k goal)
- Developing online course (passive income stream)
- Paying down mortgage faster (reduce fixed obligations)
- Accepts: Future uncertainty unknowable, must build resilience
✅ Risk Awareness Checklist
Understanding Your Exposure:
Income Assessment:
- ☐ Identify income sources (salary, contracts, investments, side hustles)
- ☐ How many sources? (1 = high concentration)
- ☐ What % of income from largest source? (>80% = risky)
- ☐ How quickly could income disappear? (immediate vs gradual)
- ☐ Job security: Permanent vs contract vs self-employed
- ☐ Industry stability: Essential vs discretionary sector
Fixed Obligations:
- ☐ List all fixed monthly costs (mortgage, rent, loans, insurance)
- ☐ Total fixed obligations: $____/month
- ☐ As % of current income: ____%
- ☐ Could you reduce these if income dropped? Yes / No
- ☐ Debt-to-income ratio: ____% (under 30% preferred)
Emergency Reserves:
- ☐ Current emergency fund: $____
- ☐ Months of expenses covered: ____ months
- ☐ Target based on employment type:
- Permanent employee: 3-6 months
- Contract worker: 6-9 months
- Self-employed: 9-12 months
- ☐ Funds accessible without penalty? Yes / No
Risk vs Uncertainty Identification:
Measurable Risks (can quantify):
- ☐ Job loss in stable industry (5-10% annual probability)
- ☐ Car accident (insurance actuarial data available)
- ☐ Investment volatility (historical standard deviation)
- ☐ Rental income variation (typical vacancy rates)
True Uncertainty (cannot quantify):
- ☐ Industry disruption (technology, regulation)
- ☐ Health crisis (personal or pandemic)
- ☐ Economic shock (recession, crisis)
- ☐ Geopolitical events
- ☐ Natural disasters
Protection Strategies in Place:
Against Risk:
- ☐ Income diversification (multiple clients/employers)
- ☐ Investment diversification (across asset classes)
- ☐ Insurance coverage (health, income protection, life, property)
- ☐ Skills development (remain marketable)
Against Uncertainty:
- ☐ Adequate emergency fund (6-12 months)
- ☐ Conservative debt levels (can afford if income drops)
- ☐ Flexible lifestyle (can cut expenses if needed)
- ☐ Adaptable skills (transferable across industries)
- ☐ Strong network (opportunities come through relationships)
- ☐ Multiple income potential (can pivot if needed)
Red Flags:
- ☐ Single income source (no diversification)
- ☐ Emergency fund < 3 months expenses
- ☐ Debt service > 40% of income
- ☐ All wealth in single asset (one property, one stock)
- ☐ Assuming "this time is different" (historical trends will continue)
- ☐ Maximal leverage (borrowing to limit)
- ☐ No insurance despite dependents
Action Plan:
- ☐ Calculate true emergency fund need
- ☐ Set up automatic savings to build buffer
- ☐ Review insurance coverage (adequate?)
- ☐ Assess income concentration (too reliant on one source?)
- ☐ Consider debt reduction (lower fixed obligations)
- ☐ Develop backup income skills/streams
- ☐ Build professional network
- ☐ Avoid over-optimisation (leaves no margin for error)
Final insight: Risk vs uncertainty: risk is measurable (dice roll, insurance probabilities, market volatility), uncertainty is immeasurable (pandemics, disruption, black swans). Risk can be quantified and managed through diversification, insurance, hedging. Uncertainty cannot be predicted - must build resilience through emergency funds (6-12 months), multiple income streams, conservative debt, adaptability. Markets demonstrate both: can measure historical volatility (risk) but cannot predict crashes (uncertainty). Property: can measure price trends but not earthquake timing or policy changes. Personal income: employees have measurable layoff risk (~5% annually), self-employed face higher uncertainty (client loss, market changes). Protection strategies: emergency fund critical (larger for self-employed), diversify income/investments/skills, avoid concentration, keep debt conservative, maintain flexibility. Mike contractor scenario: earned $120k, felt secure with 5-year track record, had only 2-month emergency fund. COVID-19 struck (uncertainty) - income dropped to near-zero immediately, learned hard way that self-employed need 6-12 month buffers, took permanent job for stability, now building resilience. Risk awareness checklist: assess income sources, measure fixed obligations, calculate emergency fund adequacy, distinguish risk from uncertainty, implement protection strategies. Don't confuse measurable variation (risk) with unknowable events (uncertainty) - both require different approaches.
🎯 Test Your Knowledge
Quiz on Risk vs Uncertainty
Related guides
- Contract Risk, a related guide in the same area.
- Flood Zones and Climate Risk NZ, a related guide in the same area.
- The Risk of Payday Lending, a related guide in the same area.
Related tools and guides
- Time horizon risk calculator: risk quantified over your actual horizon.
- Expected value calculator: the arithmetic of decisions under known odds.