Purchasing Power

Purchasing power measures the real value of money in terms of the goods and services it can buy. When inflation rises, each dollar buys less, meaning purchasing power decreases. For example, $100 in 2000 had the same purchasing power as approximately $180 in 2024, meaning prices roughly doubled over that period.

Inflation is the primary factor eroding purchasing power over time. At a 3% annual inflation rate, prices double approximately every 24 years. This has profound implications for long-term financial planning. Retirees who rely on fixed-income sources without cost-of-living adjustments face a steady decline in their standard of living as prices rise around them.

Protecting purchasing power is a fundamental goal of investing. Assets that have historically outpaced inflation include equities, real estate, Treasury Inflation-Protected Securities, and commodities. Holding cash or low-yield savings accounts for extended periods results in a guaranteed loss of purchasing power. Understanding this concept motivates appropriate investment behavior and helps explain why even conservative investors need some growth-oriented assets in their portfolios.