Monthly Return Calculator Using Adjusted Close Prices
Accurately measure investment performance by calculating monthly returns with our easy-to-use tool.
The stock’s adjusted closing price at the start of the month.
The stock’s adjusted closing price at the end of the month.
What Does it Mean to Calculate Monthly Returns Using Adj. Close Prices?
To calculate monthly returns using adj. close prices is to determine the percentage gain or loss of a stock over one month, using a price that has been adjusted for corporate actions. The ‘adjusted close’ price provides a far more accurate reflection of an investor’s true return than the simple market closing price. It accounts for events like stock splits and dividend distributions, which affect a stock’s price but not the underlying value of the investment.
This calculation is fundamental for investors who want to compare the performance of different assets over time. By using the adjusted price, you ensure that you are comparing apples to apples, as the historical data is corrected to reflect the stock’s value as if those corporate actions had occurred at that time. This is why for any serious backtesting or performance analysis, you should always use the adjusted close.
The Formula to Calculate Monthly Returns
The formula for calculating the monthly return on a stock is straightforward and powerful. It shows the return relative to the initial investment.
Monthly Return (%) = [ (Ending Adj. Close – Beginning Adj. Close) / Beginning Adj. Close ] × 100
This formula is a specific application of the general rate of return calculation.
Variable Explanations
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Ending Adj. Close | The adjusted closing price of the stock at the end of the monthly period. | Currency (e.g., USD, EUR) | 0.01 to 1,000,000+ |
| Beginning Adj. Close | The adjusted closing price of the stock at the beginning of the monthly period. | Currency (e.g., USD, EUR) | 0.01 to 1,000,000+ |
For more advanced analysis, check out this guide on annualized return calculation.
Practical Examples
Let’s walk through two realistic scenarios to see how to calculate monthly returns using adj. close prices.
Example 1: Positive Monthly Return
- Inputs:
- Beginning Adj. Close: $210.50
- Ending Adj. Close: $225.25
- Calculation:
- Price Change = $225.25 – $210.50 = $14.75
- Return = ($14.75 / $210.50) * 100 = 7.01%
- Result: The monthly return is a gain of 7.01%.
Example 2: Negative Monthly Return with a Dividend
Imagine a stock’s price drops, but it paid a dividend. The adjusted close price smooths this out.
- Inputs:
- Beginning Adj. Close: $95.00
- Ending Adj. Close: $92.75
- Calculation:
- Price Change = $92.75 – $95.00 = -$2.25
- Return = (-$2.25 / $95.00) * 100 = -2.37%
- Result: The monthly return is a loss of -2.37%. Even if the unadjusted price drop was larger, the adjusted price provides the true total return picture. For more detail, see this guide to total stock return.
Example Monthly Returns Table and Chart
To visualize performance, here is a hypothetical 6-month performance table for a stock and a chart representing its monthly returns.
| Month | Beginning Price (USD) | Ending Price (USD) | Monthly Return (%) |
|---|
How to Use This Monthly Return Calculator
- Enter Beginning Price: Input the adjusted closing price of your stock at the start of the month.
- Select Currency: Choose the currency of the price from the dropdown menu (e.g., USD, EUR).
- Enter Ending Price: Input the adjusted closing price at the end of the month.
- Click Calculate: The tool will instantly compute your monthly return.
- Review Results: The calculator will show the primary result (monthly return as a percentage) and intermediate values like the absolute price change.
This process gives you a clear and accurate measure of your investment’s performance for the period. If you need to track multiple investments, consider using an investment portfolio tracker.
Key Factors That Affect Monthly Returns
Stock returns are not random; they are influenced by a variety of interconnected factors. Understanding these can help you better interpret your monthly returns.
- Corporate Earnings: Strong profits or positive earnings surprises often drive stock prices up, boosting returns.
- Economic Indicators: Data like GDP growth, inflation rates, and unemployment figures shape investor sentiment and can heavily influence the market.
- Interest Rates: Changes in central bank interest rates can make stocks more or less attractive compared to bonds, impacting stock prices.
- Industry Trends: Technological shifts, regulatory changes, or changes in consumer behavior can lift or suppress an entire industry sector.
- Market Sentiment: Sometimes, the overall mood of the market (bullish or bearish) can create momentum that affects stocks regardless of their individual fundamentals.
- Geopolitical Events: Global events, from trade disputes to political instability, can create uncertainty and volatility, impacting returns across markets.
Frequently Asked Questions (FAQ)
1. What is an adjusted close price?
The adjusted closing price is a stock’s closing price that has been amended to reflect corporate actions like dividends, stock splits, and new share offerings. It’s the key to calculating an accurate historical return.
2. Why shouldn’t I use the regular ‘close’ price to calculate returns?
The regular close price does not account for dividends or stock splits. If a stock splits 2-for-1, its price is halved, which would look like a 50% loss if you used the unadjusted close price. Adjusted prices correct for these distortions.
3. Where can I find adjusted close prices?
Most major financial data providers, like Yahoo Finance, Google Finance, and Bloomberg, provide historical data tables that include the adjusted close price.
4. Can this calculator be used for any time period?
Yes, while it’s designed to calculate monthly returns using adj. close prices, the formula works for any period. You could use it to calculate weekly, quarterly, or annual returns by simply using the adjusted prices from the start and end of your desired timeframe.
5. What does a negative monthly return mean?
A negative return means the value of your investment decreased over the month. This happens when the ending adjusted close price is lower than the beginning adjusted close price.
6. Does this calculation include trading fees?
No, this is a pure price return calculation. To find your true net return, you would need to subtract any trading commissions or fees you paid. To factor this in, you might explore a capital gains calculator.
7. How does a dividend payment affect the return?
A dividend payment is reflected in the adjusted close price. When a company pays a dividend, its value decreases by the dividend amount, but this value is transferred to the shareholder. The adjusted close price accounts for this, giving you a total return figure that includes the benefit of the dividend. To learn more, read about dividend reinvestment impact.
8. What is a good monthly return?
A “good” return is relative and depends on the stock’s risk, the industry, and the overall market performance. A common benchmark is the S&P 500’s average monthly return, which historically is around 0.8-1.0%. Comparing your stock’s return to a relevant index is a good way to gauge its performance.