How Will Amgen Stock React To Its Upcoming Earnings?
Amgen (NASDAQ:AMGN) is set to report its earnings on Thursday, April 30, 2026. The company has $183 Bil in current market capitalization. Revenue over the last twelve months was $37 Bil, and it was operationally profitable with $9.1 Bil in operating profits and net income of $7.7 Bil. While a lot will depend on how results stack up against consensus and expectations, understanding historical patterns might just turn the odds in your favor if you are an event-driven trader.
There are two ways to do that: understand the historical odds and position yourself prior to the earnings release, or look at the correlation between immediate and medium-term returns post earnings and position yourself accordingly after the earnings are released.
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Amgen’s Historical Odds Of Positive Post-Earnings Return
Some observations on one-day (1D) post-earnings returns:
- There are 19 earnings data points recorded over the last five years, with 9 positive and 10 negative one-day (1D) returns observed. In summary, positive 1D returns were seen about 47% of the time.
- Notably, this percentage increases to 55% if we consider data for the last 3 years instead of 5.
- Median of the 9 positive returns = 6.5%, and median of the 10 negative returns = -3.6%
Additional data for observed 5-Day (5D) and 21-Day (21D) returns post earnings are summarized along with the statistics in the table below.
| Forward Returns | |||
|---|---|---|---|
| Earnings Date | 1D | 5D | 21D |
| 2/3/2026 | 8.2% | 7.7% | 9.3% |
| 11/4/2025 | 7.8% | 14.1% | 12.0% |
| 8/5/2025 | -5.1% | -5.0% | -5.9% |
| 5/1/2025 | -0.9% | -4.1% | 2.6% |
| 2/4/2025 | 6.5% | 2.6% | 10.9% |
| 10/30/2024 | 1.5% | 2.0% | -9.6% |
| 8/6/2024 | -5.0% | -1.7% | -0.7% |
| 5/2/2024 | 11.8% | 12.4% | 11.2% |
| 2/6/2024 | -6.4% | -8.1% | -13.0% |
| 10/31/2023 | -2.8% | 3.7% | 2.1% |
| 8/3/2023 | 5.5% | 13.6% | 12.2% |
| 4/27/2023 | -0.2% | -3.5% | -8.9% |
| 1/31/2023 | -2.4% | -3.3% | -6.2% |
| 11/3/2022 | 1.2% | 9.5% | 7.9% |
| 8/4/2022 | -0.3% | 0.6% | -1.1% |
| 4/27/2022 | -4.3% | -5.1% | 2.5% |
| 2/7/2022 | 7.8% | 1.2% | 4.4% |
| 11/2/2021 | 1.8% | -1.2% | -5.3% |
| 8/3/2021 | -6.5% | -6.6% | -7.8% |
| SUMMARY STATS | |||
| # Positive | 9 | 10 | 10 |
| # Negative | 10 | 9 | 9 |
| Median Positive | 6.5% | 5.7% | 8.6% |
| Median Negative | -3.6% | -4.1% | -6.2% |
| Max Positive | 11.8% | 14.1% | 12.2% |
| Max Negative | -6.5% | -8.1% | -13.0% |
Correlation Between 1D, 5D and 21D Historical Returns
A relatively less risky strategy (though not useful if the correlation is low) is to understand the correlation between short-term and medium-term returns post earnings, find a pair that has the highest correlation, and execute the appropriate trade. For example, if 1D and 5D show the highest correlation, a trader can position themselves “long” for the next 5 days if the 1D post-earnings return is positive. Here is some correlation data based on a 5-year and a 3-year (more recent) history. Note that the correlation 1D_5D refers to the correlation between 1D post-earnings returns and subsequent 5D returns.
| History | 1D_5D | 1D_21D | 5D_21D |
|---|---|---|---|
| 5Y History | -2.3% | 1.2% | -8.2% |
| 3Y History | 1.9% | 14.8% | -10.5% |
Is There Any Correlation With Peer Earnings?
Sometimes, peer performance can have an influence on post-earnings stock reaction. In fact, the pricing-in might begin before the earnings are announced. Here is some historical data on the past post-earnings performance of Amgen stock compared with the stock performance of peers that reported earnings just before Amgen. For fair comparison, peer stock returns also represent post-earnings one-day (1D) returns.
| 1D Return | Peer Post-Earnings 1D Return | |
|---|---|---|
| AMGN Earnings Dates | AMGN | JNJ |
| 2/3/2026 | 8.2% | 6.9% |
| 11/4/2025 | 7.8% | -2.1% |
| 8/5/2025 | -5.1% | 3.6% |
| 5/1/2025 | -0.9% | 0.5% |
| 2/4/2025 | 6.5% | 5.7% |
| 10/30/2024 | 1.5% | -2.1% |
| 8/6/2024 | -5.0% | 1.5% |
| 5/2/2024 | 11.8% | 3.8% |
| 2/6/2024 | -6.4% | -1.1% |
| 10/31/2023 | -2.8% | -5.0% |
| 8/3/2023 | 5.5% | 1.3% |
| 4/27/2023 | -0.2% | 1.2% |
| 1/31/2023 | -2.4% | -2.9% |
| 11/3/2022 | 1.2% | 2.8% |
| 8/4/2022 | -0.3% | 0.1% |
| 4/27/2022 | -4.3% | -0.5% |
| 2/7/2022 | 7.8% | 2.0% |
| 11/2/2021 | 1.8% | 1.0% |
| 8/3/2021 | -6.5% | 2.9% |
| CORRELATION | -3.4% |
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