Why Is Amkor Technology (AMKR) Stock Down -24.08% Today?
Key Takeaways
- Amkor Technology shares plunged 24.08% to $46.09 in Tuesday's session, extending a brutal sell-off that began after the company's second-quarter earnings report.
- The primary catalyst was weaker-than-expected third-quarter revenue guidance, issued alongside otherwise strong Q2 results, with the company forecasting $1.95–$2.05 billion versus the Street's $2.12 billion consensus estimate.
- Communications segment weakness — driven by Android memory supply constraints and an ongoing system-in-package (SiP) production migration from Korea to Vietnam — emerged as a major headwind souring investor sentiment.
- Broader semiconductor sector weakness compounded the sell-off, with semiconductor stocks lagging the broader market on Tuesday.
- The stock has now fallen more than 52% from its 52-week high of $96.68, and traders are closely watching whether the $45 level can provide technical support after today's rout.
Opening Summary
AMKR — Amkor Technology, Inc., a leading global provider of outsourced semiconductor packaging and test (OSAT) services — saw its shares crater 24.08% on Tuesday, tumbling from Monday's closing price of $60.71 to an intraday level of $46.09. The collapse extends a multi-session rout that began after the company reported second-quarter fiscal 2026 results on Monday after the closing bell. While Amkor delivered record quarterly revenue of $1.90 billion and earnings per share of $0.70 that handily beat analyst estimates, it was the company's softer-than-expected third-quarter revenue outlook — combined with mounting communications segment headwinds — that triggered the massive sell-off. The stock had already dropped 6.54% during Monday's regular session and continued to deteriorate in after-hours and pre-market trading before accelerating sharply during Tuesday's session.
Q2 Results Topped Estimates, but Q3 Revenue Guidance Disappointed
Amkor's second-quarter numbers were impressive on the surface. Revenue surged 26% year-over-year to a record $1.90 billion, surpassing the analyst consensus of roughly $1.81 billion. Earnings per diluted share came in at $0.70, nearly 49% above the $0.47 Street estimate. Gross margin expanded more than 250 basis points sequentially to 16.8%, driven by higher factory utilization — which climbed from the 50% range into the 70% range — and an improving product mix tilted toward advanced packaging. Computing and automotive/industrial end markets each posted record quarterly revenue, with computing surging 20% sequentially on AI data-center demand.
Despite the beat, the company's third-quarter revenue guidance of $1.95 billion to $2.05 billion fell meaningfully short of the $2.12 billion consensus. Though EPS guidance of $0.72 to $0.82 exceeded the $0.66 analyst expectation, markets fixated on the top-line shortfall. The guidance miss signaled that near-term headwinds were accelerating faster than the company's strong advanced-packaging momentum could offset, prompting a sharp re-rating of the stock.
Communications Weakness and SiP Migration Disruption
The single largest drag on Amkor's outlook is the communications segment, which represents roughly 42% of total revenue. On the earnings call, CEO Kevin Engel revealed that Android revenue had already declined 20% in the second quarter, pressured by memory supply chain constraints and shifting customer build patterns. Management guided for communications revenue to decline by a high-single-digit percentage sequentially in Q3 — an unusual seasonal pattern for a quarter that typically benefits from smartphone production ramps.
Compounding the market-driven softness, Amkor is in the midst of a strategic migration of its system-in-package (SiP) production from Korea to Vietnam. While management framed the move as a long-term efficiency initiative that frees up Korean capacity for higher-value computing programs, the near-term disruption is proving painful. Engel cautioned that the SiP transition would not be a one-quarter event, with headwinds expected to persist through the fourth quarter and into the first half of 2027. The lack of clear near-term visibility around this operational disruption appeared to be a tipping point for investors already on edge.
Sector and Broader Market Pressure
Amkor's plunge did not occur in isolation. The semiconductor sector was Tuesday's worst-performing group, with the group down roughly 6.3% on the day. The stock's sell-off was further amplified by technical breakdowns: with today's decline, AMKR has now decisively sliced below both its 50-day moving average of approximately $73 and its 200-day moving average near $61, triggering additional momentum-based selling. Broader market indices showed mixed performance, confirming that Amkor's decline was driven primarily by company-specific and sector-specific factors rather than a broad market pullback.
Volume was exceptionally elevated on Tuesday, following Monday's already heavy trading of over 10.8 million shares — roughly double the stock's 10-day average volume of approximately 5.1 million shares. The surge in selling volume underscored the conviction behind the move and suggested institutional repositioning away from the name.
What Comes Next for AMKR
Investors now face a delicate balancing act when evaluating AMKR shares. On one hand, the company's strategic positioning in advanced packaging — anchored by a 10-year agreement with TSMC and a multi-year partnership with NVIDIA — provides a credible long-term growth narrative tied to AI and high-performance computing. The computing segment is expected to grow nearly 30% sequentially in Q3, and gross margins are projected to expand further to 18.5%–19.5%.
On the other hand, the communications overhang and SiP migration disruption will likely keep sentiment in check for multiple quarters. Management acknowledged that Phase 1 of the Arizona facility is fully committed, but the ramp of that capacity is expected to create margin headwinds in 2027 and 2028 due to underutilization costs. With the stock now trading at levels not seen since early 2026, the burden of proof has shifted firmly onto management to demonstrate that the current operational disruptions are transitory and that the advanced-packaging growth trajectory remains intact.
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AMKR's MACD Histogram crosses above signal line
The Moving Average Convergence Divergence (MACD) for AMKR turned positive on August 07, 2026. Looking at past instances where AMKR's MACD turned positive, the stock continued to rise in of 49 cases over the following month. The odds of a continued upward trend are .
Technical Analysis (Indicators)
Bullish Trend Analysis
The RSI Oscillator points to a transition from a downward trend to an upward trend -- in cases where AMKR's RSI Oscillator exited the oversold zone, of 28 resulted in an increase in price. Tickeron's analysis proposes that the odds of a continued upward trend are .
The Stochastic Oscillator demonstrated that the ticker has stayed in the oversold zone for 1 day, which means it's wise to expect a price bounce in the near future.
Following a 3-day Advance, the price is estimated to grow further. Considering data from situations where AMKR advanced for three days, in of 324 cases, the price rose further within the following month. The odds of a continued upward trend are .
AMKR may jump back above the lower band and head toward the middle band. Traders may consider buying the stock or exploring call options.
Bearish Trend Analysis
The Momentum Indicator moved below the 0 level on August 18, 2026. You may want to consider selling the stock, shorting the stock, or exploring put options on AMKR as a result. In of 94 cases where the Momentum Indicator fell below 0, the stock fell further within the subsequent month. The odds of a continued downward trend are .
Following a 3-day decline, the stock is projected to fall further. Considering past instances where AMKR declined for three days, the price rose further in of 62 cases within the following month. The odds of a continued downward trend are .
The Aroon Indicator for AMKR entered a downward trend on August 07, 2026. This could indicate a strong downward move is ahead for the stock. Traders may want to consider selling the stock or buying put options.
Fundamental Analysis (Ratings)
The Tickeron PE Growth Rating for this company is (best 1 - 100 worst), pointing to outstanding earnings growth. The PE Growth rating is based on a comparative analysis of stock PE ratio increase over the last 12 months compared against S&P 500 index constituents.
The Tickeron Valuation Rating of (best 1 - 100 worst) indicates that the company is slightly undervalued in the industry. This rating compares market capitalization estimated by our proprietary formula with the current market capitalization. This rating is based on the following metrics, as compared to industry averages: P/B Ratio (2.685) is normal, around the industry mean (8.019). P/E Ratio (22.538) is within average values for comparable stocks, (159.406). AMKR's Projected Growth (PEG Ratio) (0.000) is very low in comparison to the industry average of (1.475). Dividend Yield (0.007) settles around the average of (0.006) among similar stocks. P/S Ratio (1.681) is also within normal values, averaging (33.263).
The Tickeron Price Growth Rating for this company is (best 1 - 100 worst), indicating fairly steady price growth. AMKR’s price grows at a lower rate over the last 12 months as compared to S&P 500 index constituents.
The Tickeron SMR rating for this company is (best 1 - 100 worst), indicating strong sales and a profitable business model. SMR (Sales, Margin, Return on Equity) rating is based on comparative analysis of weighted Sales, Income Margin and Return on Equity values compared against S&P 500 index constituents. The weighted SMR value is a proprietary formula developed by Tickeron and represents an overall profitability measure for a stock.
The Tickeron Profit vs. Risk Rating rating for this company is (best 1 - 100 worst), indicating that the returns do not compensate for the risks. AMKR’s unstable profits reported over time resulted in significant Drawdowns within these last five years. A stable profit reduces stock drawdown and volatility. The average Profit vs. Risk Rating rating for the industry is 65, placing this stock worse than average.
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General Information
a provider of outsourced semiconductor packaging and test services
Industry ElectronicProductionEquipment
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