Is Amphastar Pharmaceuticals, Inc. technically bullish or bearish?

As of 31 October 2025, the technical trend for Amphastar Pharmaceuticals, Inc. has changed from sideways to mildly bullish. The daily moving averages indicate a mildly bullish stance, while the weekly and monthly MACD readings are bearish. The KST shows a bullish signal on the weekly timeframe but bearish on the monthly. Dow Theory supports a mildly bullish outlook on both weekly and monthly bases, and the OBV is also mildly bullish.
In terms of performance, the stock has underperformed against the S&P 500 across multiple periods, with a year-to-date return of -31.32% compared to the S&P 500's 16.30%, and a one-year return of -49.53% against 19.89% for the benchmark. Overall, the current technical stance is mildly bullish, but the stock's performance relative to the S&P 500 suggests significant underperformance.