Foundational concepts for managing money and building long-term stability.
Net worth
Assets minus liabilities; a snapshot of your financial position.
Emergency fund
Liquid cash buffer for surprises; reduces reliance on high-interest debt.
Compound interest
Earnings on principal plus prior earnings; growth accelerates over time.
Inflation
Prices rise over time; the same money buys less (focus on real purchasing power).
Diversification
Spreading risk across assets; reduces dependence on any single outcome.
Cash flow
Income minus expenses; the fuel for saving and investing.
Fixed vs variable expenses
Fixed are stable (rent), variable fluctuate (food). Knowing both helps planning.
APR
Annual Percentage Rate; includes interest and some fees (useful for comparing debt).
High-interest debt
Debt with high APR tends to dominate finances; prioritize paying it down.
Minimum payment trap
Paying only the minimum maximizes interest paid and time to payoff.
Credit utilization
Percent of credit limit used; high utilization can hurt credit scores.
Index fund
A fund that tracks a market index; typically low-cost and diversified.
Expense ratio
Annual fee as a % of assets; small differences compound over time.
Fee drag
Fees reduce compounding; lowering fees increases long-term outcomes.
Asset allocation
Mix of stocks/bonds/cash; primary driver of risk and return.
Risk tolerance
How much volatility you can emotionally and financially handle.
Time horizon
When you need the money affects how much risk you can take.
Dollar-cost averaging
Investing a fixed amount regularly; reduces timing risk.
Liquidity
How quickly you can convert an asset to cash without major loss.
Insurance
Paying a known cost to reduce risk of rare, large losses.
Real return
Return after inflation; what matters for future purchasing power.
Nominal return
Return before inflation; can look better than real outcomes.
Opportunity cost
Money spent in one place cannot be used elsewhere; compare alternatives.
Margin of safety
Keep buffers (cash, time, lower fixed costs) to reduce fragility.