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3-1 Month Momentum % is the total return of the stock from 3-month ago to 1-month ago. As of today (2026-07-22), Amphastar Pharmaceuticals's 3-1 Month Momentum % is -11.32%.
The industry rank for Amphastar Pharmaceuticals's 3-1 Month Momentum % or its related term are showing as below:
AMPH's 3-1 Month Momentum % is ranked worse than 55.38% of 1022
companies
in the Drug Manufacturers industry
Industry Median: -9.5
vs AMPH: -11.32
Momentum investing is a trading strategy in which investors buy securities that are rising and sell before the prices start to go back down. The 3-1 Month Momentum % measures the total return to a stock over the past three months, but ignores the previous month.
The reason why the most recent month’s return dropped related to the short-term reversal effect associated with momentum. There is an academic finding that short-term momentum actually has a reversal effect, whereby the previous winners (measured over the past months) do poorly the next month, while the previous losers do well the next month. In order to eliminate the short-term reversal effect, the previous month return was not included in this calculation.
Amphastar Pharmaceuticals 3-1 Month Momentum % Related Terms
AMPH vs ETON, PCRX, BIOA: 3-1 Month Momentum % Comparison
For the Drug Manufacturers - Specialty & Generic subindustry, Amphastar Pharmaceuticals's 3-1 Month Momentum %, along with its competitors' market caps and 3-1 Month Momentum % data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Amphastar Pharmaceuticals 3-1 Month Momentum % vs Drug Manufacturers Industry
For the Drug Manufacturers industry and Healthcare sector, Amphastar Pharmaceuticals's 3-1 Month Momentum % distribution charts can be found below:
* The bar in red indicates where Amphastar Pharmaceuticals's 3-1 Month Momentum % falls into.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Amphastar Pharmaceuticals (AMPH) has a 3-1 Month Momentum % of -11.32% as of Jul. 22, 2026. 3-1 Month Momentum measures the total return of the stock from 3-month ago to 1-month ago. View historical data on Amphastar Pharmaceuticals and its competitors. According to the industry distribution chart, Amphastar Pharmaceuticals ranks #566 out of 1022 companies in the Drug Manufacturers industry, placing it in the top 55.4%.
Is Amphastar Pharmaceuticals' 3-1 Month Momentum % too high?
Amphastar Pharmaceuticals' current 3-1 Month Momentum % is -11.32%. Based on the distribution chart, Amphastar Pharmaceuticals ranks #566 out of 1022 companies in the Drug Manufacturers industry, which is below the industry midpoint. Overall, Amphastar Pharmaceuticals has a GF Score™ of 83/100 and is considered Significantly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Amphastar Pharmaceuticals' 3-1 Month Momentum % compare to ETON and PCRX?
According to the Drug Manufacturers industry distribution chart, Amphastar Pharmaceuticals ranks #566 out of 1022 companies for 3-1 Month Momentum %. This places Amphastar Pharmaceuticals in the lower half of its industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good 3-1 Month Momentum % for a Drug Manufacturers company?
A good 3-1 Month Momentum % depends on the Drug Manufacturers industry context. However, 3-1 Month Momentum % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high 3-1 Month Momentum % mean?
A high 3-1 Month Momentum % can signal that a stock is expensive relative to its fundamentals. 3-1 Month Momentum measures the total return of the stock from 3-month ago to 1-month ago. View historical data on Amphastar Pharmaceuticals and its competitors. Amphastar Pharmaceuticals's current 3-1 Month Momentum % is -11.32%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Amphastar Pharmaceuticals stock overvalued right now?
Based on GuruFocus' analysis, Amphastar Pharmaceuticals (AMPH) is currently considered Significantly Undervalued. The stock's GF Value™ is $48.97, compared to a current price of $19.59 — trading 60% below its estimated fair value. The current 3-1 Month Momentum % is -11.32%. Amphastar Pharmaceuticals' overall GF Score™ is 83/100 with 4 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is 3-1 Month Momentum % calculated?
3-1 Month Momentum % is calculated from a company's financial statements. For Amphastar Pharmaceuticals (AMPH), the current 3-1 Month Momentum % is -11.32% as of Jul. 22, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Amphastar Pharmaceuticals (AMPH) Overvalued in 2026?
Based on GuruFocus' analysis, Amphastar Pharmaceuticals stock appears to be undervalued.
The current stock price of $19.59 is trading 60% below its estimated GF Value™ of $48.97.
GuruFocus considers Amphastar Pharmaceuticals to be Significantly Undervalued.
Key valuation signals for AMPH:
3-1 Month Momentum %: -11.32%
GF Value™: $48.97 vs. price of $19.59 (60% below fair value)
No single metric tells the full story. See the AMPH stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Amphastar Pharmaceuticals Inc is a bio-pharmaceutical company focusing on developing, manufacturing, marketing, and selling technically challenging generic and proprietary injectable, inhalation, and intranasal products, as well as insulin active pharmaceutical ingredient (or insulin API products. The company's finished products are used in hospital or urgent care clinical settings and are contracted and distributed through group purchasing organizations and drug wholesalers. The company has one reportable segment: pharmaceutical products. Geographically, the business presence of the firm is seen in the United States, China, and France, of which the U.S. accounts for the majority of the revenue.
83GF Score
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