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AMKR

Amkor Technology, Inc. Technology As of 2026-07-31 Updated daily after market close

steady quality, premium valuation.

2 active signals

Filed revenue acceleration EPS surprise beat

This page refreshes daily after the close. Add Amkor Technology, Inc. to your watchlist to track signal changes on your next visit.

Is Amkor Technology, Inc. a buy? Fundamentals and valuation first

Quality is above average. Operating margin sits near the 54th percentile. TTM ROE is about 11.9%.
Valuation is expensive. TTM P/E is in the 88th percentile, above most peers.
Recent volatility is elevated. 60-day annualized volatility is in the 86th percentile. Average 20-day dollar volume is about $358.1M.
Signals are active now. Filed revenue acceleration, EPS surprise beat currently holds; the tables below show what followed in this stock’s own history.

Historical evidence

Signals active now

Each active condition is tested against this stock’s own history and benchmarked versus the S&P 500.

Filed revenue acceleration

Active · now 17.93270810607883%

TTM revenue growth is at least 10% and improved versus the prior filed quarter; event date is the SEC filing date.

9 historical occurrences (since 2020-07-30)

120 days after: historical avg +20.76%

20-day +7.55%

60-day +6.09%

120-day +20.76%

20-day

60-day

120-day

Win

75%

37.5%

71.4%

Sample

Median

+1.77%

-4.17%

+10.31%

Excess

+3.08%

+2.24%

+12.74%

Beat mkt rate

62.5%

50%

42.9%

Over 7 occurrences, 120-day forward avg gained 20.76%, beat the market by 12.74 pts; win rate 71.4%.

EPS surprise beat

Active · now 48.93617021276596%

Reported EPS beat consensus estimate by at least 5%; event date is the earnings-surprise timestamp.

38 historical occurrences (since 2015-02-09)

120 days after: historical avg +20.65%

20-day +2.69%

60-day +7.51%

120-day +20.65%

20-day

60-day

120-day

Win

64.7%

52.9%

65.6%

Sample

Median

+2.96%

+1.84%

+10.37%

Excess

+2.49%

+4.97%

+14.68%

Beat mkt rate

55.9%

47.1%

59.4%

Over 32 occurrences, 120-day forward avg gained 20.65%, beat the market by 14.68 pts; win rate 65.6%.

Valuation regime and forward returns

Daily TTM P/E is converted into an expanding own-history percentile, then grouped into five valuation regimes. Forward returns use adjusted prices over the next 240 trading days.

0-20 +28.5%

20-40 +33.6%

40-60 +59%

60-80 +101.1%

80-100 -15.5% Now

PE percentile band	Sample days	240-day avg return	Median	Win rate	Avg excess (vs index)
0-20	233	+28.5%	+28.6%	97.4%	+19.8%
20-40	219	+33.6%	+21.4%	82.6%	+20.9%
40-60	427	+59%	+45.2%	71.9%	+41%
60-80	229	+101.1%	+65%	79%	+82%
80-100 You are here	267	-15.5%	-23.1%	12%	-31.5%

Quarterly EPS is aligned by SEC filing date before it is forward-filled to daily prices. The expanding percentile uses only information available up to each day.

Current TTM P/E is about 41.56, placing it in the 94.3 own-history percentile, inside the 80-100 bucket.

Valuation × momentum analogs

Each historical day is grouped by own-history P/E tercile and 60-day momentum direction, then tested for the next 120-trading-day adjusted return.

Valuation

Momentum

Cheap (own-history bottom third)

Middle

Expensive (own-history top third)

60-day momentum up

+10.1%

Win rate 51.8% Excess +5%

139d

+22.4%

Win rate 78.1% Excess +12.7%

311d

+38.4%

Win rate 73.5% Excess +29.4%

344d

60-day momentum down

+10.9%

Win rate 53% Excess +11.8%

236d

+38.5%

Win rate 84.2% Excess +24.3%

265d

Now

-11.8%

Win rate 27.5% Excess -18.2%

200d

Currently in “Expensive (own-history top third) × 60-day momentum down”: across 200 historical days, 120-day forward avg declined 11.8%, win rate 27.5%, lagged the market by 18.2%.

Days = trading days in this bucket; returns use adjusted prices, ex-costs. 60-day momentum: direction of this stock's price over the past 60 trading days.

Market-wide momentum baseline

Across 97,878 liquid US common-stock samples, top-quintile 6-month momentum was followed by an average 60-trading-day return of +6.26%, a 58.3% positive-return rate, and +2.90 percentage points of average excess return versus the S&P 500.

Baseline: weekly samples since 2016 where a liquid US common stock ranked in the top quintile by 126-trading-day momentum. Forward return is 60 trading days; excess return is versus S&P 500 (^GSPC).

Signals not active now

Inactive signals still show the stock-specific historical forward-return distribution for context.

52-week adjusted-price high

Pending

Adjusted close first reaches a 252-trading-day high; repeated hits within 20 days count once.

19 times historically; 60-day forward avg +7.83%, win rate 44.4%, beating the market by +3.46 pts on average.

Top-quintile 6-month momentum

Pending

The stock ranks in the top 20% of the liquid US common-stock universe by 126-day adjusted return.

21 times historically; 60-day forward avg +4.08%, win rate 40%, beating the market by -1.52 pts on average.

Method and limits

Returns use us_price:adj_close, adjusted for splits and dividends where available.
Excess returns use world_index:^GSPC as the S&P 500 benchmark proxy.
Quarterly fundamentals are aligned to SEC filing dates before daily valuation studies.
The promoted universe starts from active NYSE/NASDAQ common stocks, then applies price and dollar-volume gates.
Snapshot-only tables such as analyst consensus, DCF, us_ratios, and us_key_metrics are intentionally excluded from historical evidence.
Overlapping event windows are descriptive distributions, not independent samples.

This page is for historical data analysis and education only. It is not investment advice. Backtests and historical return distributions do not predict future performance; evaluate risk independently before trading.