Inflation
The rate at which the general level of prices for goods and services is rising, resulting in a decrease in the purchasing power of currency.
Inflation is the silent thief of wealth. It is the economic reality that over time, a unit of currency (like $1 or ₹1) loses its purchasing power, meaning you can buy fewer goods and services with that same unit of currency today than you could a decade ago.
It is typically measured as an annual percentage. For example, if the inflation rate is 6%, a basket of groceries that cost ₹100 last year will cost approximately ₹106 this year.
The Mathematical Impact on Savings
Inflation is the primary reason why keeping money "safe" under a mattress or in a zero-interest checking account is mathematically a guaranteed loss. If you hide ₹1,00,000 for 10 years in a safe, you still have exactly ₹1,00,000. However, if inflation averages 6% annually, the purchasing power of that money has been cut nearly in half.
To preserve wealth, your savings must be invested in assets (like stocks, real estate, or high-yield bonds) that generate an annualized return greater than the rate of inflation. The difference between your investment return and the inflation rate is known as your Real Rate of Return.