Understanding the difference between current yield and yield on cost is essential for any serious income investor. One measures the return based on today's price, while the other measures the return based on your original investment. This distinction creates a fundamental fork in the road regarding how you evaluate the success of your portfolio.
The Definition of Current Yield
Current yield provides a snapshot of the income an investment generates relative to its current market price. To calculate it, you divide the annual dividend payment by the stock's current share price. This metric is static in the sense that it reflects the present moment, ignoring the price you actually paid to acquire the asset. It answers the question: "What is my return based on the money I see on the screen today?"
The Definition of Yield on Cost
Yield on cost (YOC) takes your purchase price into account to reveal the return on your actual investment. You calculate it by dividing the annual dividend by your original per-share purchase price. Unlike current yield, YOC incorporates your personal history with the asset, reflecting the income generated from the capital you initially deployed. It answers the question: "How efficiently is my money working for me based on what I paid?"
Illustrating the Mechanics
Imagine you buy 10 shares of a company at $50 per share, investing $500 total. The company pays an annual dividend of $2 per share. Your yield on cost is 4% ($2 divided by $50). If the market price of the stock subsequently rises to $100 per share, the current yield drops to 2% ($2 divided by $100). In this scenario, your income stream remains the same, but the market's valuation of the stock has diluted the current yield metric.
The Psychology of the Numbers investors favor yield on cost because it provides a sense of security and accomplishment. Watching your yield on cost climb over years as dividends increase creates a feeling of building wealth, even if the stock price stagnates. Conversely, current yield is the preferred metric for traders and valuation-focused investors who assess whether an asset is overpriced or underpriced relative to its earnings and income. Strategic Implications for Your Portfolio
Relying solely on yield on cost can create a dangerous illusion of safety. A stock with a high YOC might be paying that dividend because the price has collapsed, not because the company is exceptionally strong. Meanwhile, focusing only on current yield might cause you to overlook high-quality companies that are currently out of favor but have strong dividend growth track records. Balancing both perspectives allows for a more nuanced view of income and value.
Tax Considerations and Inflation
Both metrics are pre-tax calculations, but their interaction with inflation is critical. Yield on cost often serves as a reliable hedge against inflation over long holding periods, as many companies increase dividends annually. If your yield on cost is 6% and inflation is 2%, your real purchasing power from that investment grows. Current yield, however, might reflect the market's current pessimism, potentially indicating a temporary dip in the stock's price rather than a permanent loss of value.
