Amkor Technology Stock: 5 Straight Red Days, Down 36%
A steep five-day losing streak is drawing attention to this semiconductor stock, raising questions about the price versus the fundamentals.
A five-day losing streak has erased about $6.0 billion from the market value of Amkor Technology (AMKR). The stock has now moved lower for 5 consecutive trading days, a cumulative loss of 36% that leaves its market value at about $11 billion.
Amkor Technology, Inc. provides outsourced semiconductor packaging and test services. The company also provides flip chip-scale package products for use in smartphones, tablets, and other mobile consumer electronic devices.
How The Streak Stacks Up Against The S&P 500
Here is how AMKR stock stacks up against the S&P 500 over the streak and the periods around it:
| Return Period | AMKR | S&P 500 |
|---|---|---|
| 1D | -6.5% | -1.5% |
| 5D (Current Streak) | -36.2% | -2.4% |
| 1M (21D) | -48.1% | -1.7% |
| 3M (63D) | -40.1% | 2.5% |
| YTD 2026 | 8.6% | 6.9% |
| 2025 | 55.9% | 16.4% |
| 2024 | -20.8% | 23.3% |
| 2023 | 40.3% | 24.2% |
Has The Market Oversold The Business?
The data suggests the selling may be disconnected from the fundamentals. Revenue over the last twelve months grew 17.9%, compared to an S&P 500 median revenue growth of 7.8%. The stock now trades at a price-to-earnings multiple of 19.1, below the S&P 500 median of 24.4.
Its operating margin of 8.6% does trail the S&P 500 median of 18.4%. Still, the stock’s recent decline is largely its own. Over the same 5 trading days the S&P 500 returned -2.4%. For context, 76 S&P 500 stocks are on losing streaks of 3 days or more, while 124 are on winning streaks.
So How Should An Investor Approach This?
A streak is not a command to act. It is a signal that a stock has the market’s attention and that momentum has taken hold. The disciplined response is to use that signal as a reason to check the facts. The numbers here allow for a first look, comparing the business’s growth and profitability against a price that has changed quickly.
A slide like this always poses the same follow-up: which marked-down stocks are actually worth buying? Our Buy the Dip screen runs that test every day, flagging beaten-down names whose fundamentals still hold up.
Prefer the theme to this single name? Our ETF Scorecard shows how the technology funds stack up. That way no single company’s next surprise decides the outcome.
AMKR Has Fallen 66% From A Peak
A stock that falls day after day is a live lesson in what single name exposure feels like. AMKR itself has fallen 66% from a peak within the past five years, and a fall like that lands very differently when one position carries too much of your wealth. Knowing what a repeat would do to your net worth is exactly what the Trefis Wealth team computes, with the same rules-based systematic discipline that runs our High Quality Portfolio. Request a free vulnerability audit of your biggest positions.