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 sees its Stochastic Oscillator ascends from oversold territory
On July 21, 2026, the Stochastic Oscillator for AMKR moved out of oversold territory and this could be a bullish sign for the stock. Traders may want to buy the stock or buy call options. Tickeron's A.I.dvisor looked at 62 instances where the indicator left the oversold zone. In of the 62 cases the stock moved higher in the following days. This puts the odds of a move higher at over .
Technical Analysis (Indicators)
Bullish Trend Analysis
Following a 3-day Advance, the price is estimated to grow further. Considering data from situations where AMKR advanced for three days, in of 327 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 10-day RSI Indicator for AMKR moved out of overbought territory on June 23, 2026. This could be a bearish sign for the stock. Traders may want to consider selling the stock or buying put options. Tickeron's A.I.dvisor looked at 37 similar instances where the indicator moved out of overbought territory. In of the 37 cases, the stock moved lower in the following days. This puts the odds of a move lower at .
The Momentum Indicator moved below the 0 level on July 23, 2026. You may want to consider selling the stock, shorting the stock, or exploring put options on AMKR as a result. In of 93 cases where the Momentum Indicator fell below 0, the stock fell further within the subsequent month. The odds of a continued downward trend are .
The Moving Average Convergence Divergence Histogram (MACD) for AMKR turned negative on June 26, 2026. This could be a sign that the stock is set to turn lower in the coming weeks. Traders may want to sell the stock or buy put options. Tickeron's A.I.dvisor looked at 48 similar instances when the indicator turned negative. In of the 48 cases the stock turned lower in the days that followed. This puts the odds of success at .
AMKR moved below its 50-day moving average on July 02, 2026 date and that indicates a change from an upward trend to a downward trend.
The 10-day moving average for AMKR crossed bearishly below the 50-day moving average on July 10, 2026. This indicates that the trend has shifted lower and could be considered a sell signal. In of 15 past instances when the 10-day crossed below the 50-day, the stock continued to move higher over the following 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 July 27, 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 fair valued 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 (3.319) is normal, around the industry mean (8.884). P/E Ratio (34.891) is within average values for comparable stocks, (85.940). AMKR's Projected Growth (PEG Ratio) (0.000) is very low in comparison to the industry average of (1.620). Dividend Yield (0.005) settles around the average of (0.006) among similar stocks. P/S Ratio (2.137) is also within normal values, averaging (95.436).
The Tickeron Price Growth Rating for this company is (best 1 - 100 worst), indicating steady price growth. AMKR’s price grows at a higher rate over the last 12 months as compared to S&P 500 index constituents.
The Tickeron Profit vs. Risk Rating rating for this company is (best 1 - 100 worst), indicating well-balanced risk and returns. The average Profit vs. Risk Rating rating for the industry is 63, placing this stock slightly better than average.
The Tickeron Seasonality Score of (best 1 - 100 worst) indicates that the company is fair valued in the industry. The Tickeron Seasonality score describes the variance of predictable price changes around the same period every calendar year. These changes can be tied to a specific month, quarter, holiday or vacation period, as well as a meteorological or growing season.
The Tickeron SMR rating for this company is (best 1 - 100 worst), indicating slightly better than average sales and a considerably 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.
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General Information
a provider of outsourced semiconductor packaging and test services
Industry ElectronicProductionEquipment
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