#76 Alpha Score 91.1

Choi Chang-gyu

Director, NH Investment & Securities
· tracked since May 2026
76
BUZZBERG Alpha Score combines three things: realized average return, confidence in the sample size, idea volume, and speaker reputation. Speakers with only a few calls are pulled closer to the platform average; speakers with many evaluated ideas keep more of their own return. Reputation only boosts: 5.0 or lower is neutral, while scores above 5 add weight. Scores are normalized to 0-100; 100 is best. Read the FAQ
Alpha Score 91.1
Calls 24 18 Posts tracked · 0.4/day
Calls
7d 3
30d 8
90d 24
Best Calls
009150.KS long +152.2%
ARM long +108.1%
402340.KS long +66.4%
Worst Calls
000660.KS short -53.6%
267260.KS long -22.4%
010120.KS long -17.9%
Most Mentioned
ARM ×4
005930.KS ×4
000660.KS ×3
Recent Calls
011070.KS long 3 days ago
051910.KS long 3 days ago
UNR long 5 days ago
Win Rate 46% Long 22 Short 2
Win Rate
7d 67%
30d 44%
90d
Average Return +14.3% Long Return +18.6% Short Return -32.0%
Average Return
7d +2.1%
30d +8.5%
90d
Result
Result
Sort
Theme Stance
Ticker
Side
Mentions
Opened
Entry
P&L
Thesis
Theme
Source
Long
May 03
$227000.00
+55.9%
Foreigners prefer Samsung over SK Hynix
Foreign investors are heavily increasing long positions in Samsung Electronics individual stock futures, preferring it over SK Hynix due to Samsung's diversified business exposure (foundry, mobile, appliances) versus Hynix's concentration in HBM. This futures flow indicates institutional conviction that Samsung is better positioned for the current cycle.
AI/Semi
Long
May 03
$211.18
+108.1%
ARM architecture will dominate custom chips
ARM's CPU architecture is becoming the standard design base for big tech custom chips (e.g., AWS, Google, Microsoft), and its advantages in power efficiency, memory bandwidth, and CPU-GPU connectivity position it for strong growth in cloud workloads, AI inference, and rack-level AI systems. ARM's expansion into data center CPUs provides a valuation trigger.
AI/Semi
Long
May 17
$235000.00
-10.0%
LG Electronics gains from market rotation.
As the market rotates away from over-concentrated AI semiconductor stocks, LG Electronics is breaking out of a multi-year box range since Feb 2026, signaling renewed interest in non-AI names. The rotation is real, and LG Electronics is a prime beneficiary with its diverse business.
Consumer
Long
May 10
$1676000.00
+64.9%
Memory supercycle bullish for Samsung, SK hynix
The upcoming listing of single-stock 2x leveraged ETFs on Samsung Electronics and SK hynix will mechanically increase buying pressure on the underlying stocks and futures due to hedging and rebalancing flows. Although the products are risky, they represent a tactical opportunity and are likely to increase volatility and trading volumes. The speaker advises tactical use, not core allocation.
AI/Semi
Long
May 06
$4597000.00
-16.1%
Korean power equipment stocks have massive order backlog
AI agent services (e.g., Claude by Anthropic) are driving massive data center construction, which in turn creates an acute shortage of power equipment (transformers, switches, etc.). Korean power equipment companies—Hyosung Heavy Industries, LS Electric, Hyundai Electric, and Sanil Electric—have accumulated a combined order backlog of 32.6 trillion won, with delivery slots extending to 2031. Competitors from China are geopolitically excluded, and French suppliers have 4-5 year lead times, leaving Korea as the only reliable source that can meet tight delivery schedules. This structural advantage supports sustained revenue growth and earnings visibility for these companies regardless of recent stock price increases.
Energy
Long
Jun 04
$34.74
-10.0%
Space ETFs benefit from SpaceX IPO.
The SpaceX IPO on June 12 will generate massive passive inflows into space ETFs as the stock gets added to major indices (Nasdaq, MSCI, S&P 500, FTSE) over the next six months. Investors can gain exposure through US space ETFs like NASA and UFO, or Korean space ETFs, which will benefit from the rebalancing demand and the emergence of SpaceX as a benchmark for the space industry.
NatSec
Long
Jun 04
$56.65
-11.3%
Space ETFs benefit from SpaceX IPO.
The SpaceX IPO on June 12 will generate massive passive inflows into space ETFs as the stock gets added to major indices (Nasdaq, MSCI, S&P 500, FTSE) over the next six months. Investors can gain exposure through US space ETFs like NASA and UFO, or Korean space ETFs, which will benefit from the rebalancing demand and the emergence of SpaceX as a benchmark for the space industry.
NatSec
Long
May 24
$182.03
+20.4%
KOSPI direction upward, buy dips.
KOSPI has an upward direction supported by earnings momentum in semiconductors, autos, and financials, continued retail money flow from real estate into equities via ETFs and tax-advantaged accounts, government policies improving ROE and corporate governance, and a valuation discount relative to global peers. Short-term noise from foreign selling is a buying opportunity.
Macro
Long
May 07
$900000.00
+152.2%
AI inference benefits Samsung Electro-Mechanics, SK Square.
As AI moves from training to inference, power management components like MLCC and substrates become critical. The TIGER Semiconductor Top 10 ETF has increased its weights in Samsung Electro-Mechanics and SK Square to capture this shift, making them attractive investments.
AI/Semi
Long
May 07
$421.39
+27.5%
AMD leads in CPU power efficiency.
AMD's CPU architecture offers superior power efficiency and higher core counts compared to Intel, making it well-positioned for the growing AI agent and inference market where power efficiency is critical.
AI/Semi
Long
May 06
$315500.00
-17.9%
Korean power equipment stocks have massive order backlog
AI agent services (e.g., Claude by Anthropic) are driving massive data center construction, which in turn creates an acute shortage of power equipment (transformers, switches, etc.). Korean power equipment companies—Hyosung Heavy Industries, LS Electric, Hyundai Electric, and Sanil Electric—have accumulated a combined order backlog of 32.6 trillion won, with delivery slots extending to 2031. Competitors from China are geopolitically excluded, and French suppliers have 4-5 year lead times, leaving Korea as the only reliable source that can meet tight delivery schedules. This structural advantage supports sustained revenue growth and earnings visibility for these companies regardless of recent stock price increases.
Energy
Long
May 06
$1389000.00
-22.4%
Korean power equipment stocks have massive order backlog
AI agent services (e.g., Claude by Anthropic) are driving massive data center construction, which in turn creates an acute shortage of power equipment (transformers, switches, etc.). Korean power equipment companies—Hyosung Heavy Industries, LS Electric, Hyundai Electric, and Sanil Electric—have accumulated a combined order backlog of 32.6 trillion won, with delivery slots extending to 2031. Competitors from China are geopolitically excluded, and French suppliers have 4-5 year lead times, leaving Korea as the only reliable source that can meet tight delivery schedules. This structural advantage supports sustained revenue growth and earnings visibility for these companies regardless of recent stock price increases.
Energy
Long
Jun 18
$1279000.00
-10.5%
LG Innotek rides AI and space component demand.
LG Innotek is a leading Korean components and materials company with strengths in sensors, 3D sensing, lidar, and communication modules. Japan’s stock market reached all-time highs largely due to its materials/parts sector, and the AI era will similarly highlight Korean 소부장 champions. A recent secret visit by SpaceX executives to LG Innotek validates its component capabilities and positions it for new growth from AI, robotics, and space.
AI/Semi
Long
Jun 18
$351000.00
-3.7%
LG Chem benefits from physical AI battery demand.
LG Chem’s secondary battery business will see a turnaround driven by new demand from physical AI applications. Humanoid robots, autonomous vehicles, robotaxis, and satellites all require batteries, creating an entirely new demand layer. The stock is now out of favor due to China competition and oil prices, but the structural demand shift from the physical AI era can lead to a significant re-rating.
Other
Short
Jun 14
$321000.00
-10.3%
Foreigners long SK Hynix, short Samsung Electronics.
Foreign investors rolled over short positions on Samsung Electronics futures but switched to long on SK Hynix futures. This aligns with retail ETF flows and signals a relative preference for SK Hynix over Samsung Electronics.
AI/Semi
Showing 15 of 24 picks · sorted by mentions

Choi Chang-gyu has 24 trade ideas tracked on Buzzberg across 22 tickers since May 2026. Win rate 46% across 24 evaluated calls, average return +14.3%. Ranked #76 on the Buzzberg Alpha leaderboard. Most covered: ARM, 005930.KS, 000660.KS.