Amphstar Pharmaceuticals, Inc. (AMPH) Seasonality
Recurring seasonal patterns for AMPH — the calendar windows where Amphstar Pharmaceuticals, Inc. has historically tended to rise or fall, with the win rate (how often it repeated) and average return for each, based on up to 10 years of price history.
AMPH's strongest seasonal patterns
| Seasonal window | Direction | Avg return | Win rate | Hold |
|---|---|---|---|---|
| Aug 31 – Sep 10 | Bearish | -4.87% | 90% | 10d |
| Sep 2 – Sep 12 | Bearish | -4.84% | 90% | 10d |
| Sep 1 – Sep 11 | Bearish | -4.24% | 90% | 10d |
| Aug 29 – Sep 8 | Bearish | -3.07% | 90% | 10d |
| Aug 28 – Sep 7 | Bearish | -2.25% | 90% | 10d |
| May 6 – May 27 | Bullish | +8.70% | 80% | 21d |
| Apr 30 – May 30 | Bullish | +7.62% | 80% | 30d |
| Apr 27 – May 27 | Bullish | +7.45% | 80% | 30d |
| Apr 28 – May 28 | Bullish | +7.21% | 80% | 30d |
| May 1 – May 31 | Bullish | +6.32% | 80% | 30d |
| Nov 8 – Dec 8 | Bullish | +6.14% | 80% | 30d |
| Apr 26 – May 26 | Bullish | +5.76% | 80% | 30d |
Win rate = how often the pattern repeated in the same direction. Average return = the mean move across all analysed years. Past performance does not guarantee future results.
Explore AMPH seasonality in full
See the seasonal curve chart, filter by win rate and return, and track upcoming windows — free during beta.
What is AMPH stock seasonality?
Stock seasonality is the tendency of a stock to perform in a similar way during the same period each year. By analysing Amphstar Pharmaceuticals, Inc.'s price history across many years, SeasonalityX identifies recurring calendar windows — exact start and end dates — where AMPH has repeatedly risen (bullish) or fallen (bearish). Each pattern is scored by its win rate and average return so you can judge how reliable and how strong it has been.
Seasonality is one input among many — it works best alongside your own research and risk management. Learn more in our guide to seasonal analysis and the tutorials.