Core Metrics
BeginnerWhat is inflation and why does it matter?
Inflation is a broad rise in prices over time. It erodes purchasing power and affects interest rates, valuation, and asset returns.
Quick Definition
Inflation is the rate at which prices rise over time, eroding purchasing power. Central banks typically target 2% annual inflation. High inflation hurts bond returns and raises borrowing costs.
Use this concept with tools
Inflation-adjusted Return
Nominal return vs purchasing-power return.
CAGR
Calculate Compound Annual Growth Rate (CAGR) from start and end values. Convert between annualized returns and final investment amounts. Free CAGR calculator.
Compound Interest
Calculate compound interest growth with recurring contributions. See year-by-year balance breakdowns, total gains, and the power of compounding over time. Free online calculator.
Investor quotes to remember
“If you don't keep learning, others will surpass you.”
“The most dangerous words in investing are 'this time is different'.”
“I only bet when the odds are clearly in my favor.”
“Knowing what you don't know is more important than knowing what you do.”
Related concepts
What is the difference between nominal and real returns?
Nominal return is your raw percentage gain. Real return ≈ Nominal return − Inflation rate. If a fund returns 8% but inflation is 3%, your real gain is only ~5% in purchasing power.
What is the relationship between risk and return?
Higher potential returns come with higher risk — this is the fundamental risk-return tradeoff. Smart investing isn't about avoiding risk; it's about taking only the risk you understand and can afford.