Calls
48
#1044
Alpha Score 4.8
Choi Chang-gyu
Director, NH Investment & Securities
Win Rate
35.7%
return
-7.6%
Loading charts...
Ticker
Side
Mentions
First Call
Call Price
P&L
Thesis
Theme
Source
Long
May 10
$1676000.00
-0.4%
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 Memory
Long
May 03
$227000.00
+9.5%
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 Memory
Long
May 03
$211.18
+31.5%
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 ASIC
Long
May 24
$182.03
-6.6%
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.
Equity Indexes
Long
May 17
$235000.00
-29.6%
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.
AI Hardware
Long
May 07
$900000.00
+47.1%
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 Hardware
Long
May 06
$4597000.00
-36.7%
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.
Grid Equipment
Short
Jun 14
$321000.00
+22.6%
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 Memory
Long
Jun 04
$34.74
-30.4%
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.
Thematic ETFs
Long
Jun 04
$56.65
-16.2%
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.
Thematic ETFs
Long
May 24
$215.33
+0.5%
NVIDIA's Q1 earnings beat across all metrics with 85% revenue growth and 131% operating profit growth, growth acceleration for three consecutive quarters, new Vera Rubin platform set for H2, and valuation at 24x P/E cheaper than the Philadelphia Semiconductor Index at 26x, making it attractively valued despite risks from China, competitors, and potential capex cycle peak.
AI Compute
Long
May 07
$421.39
+12.2%
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 Compute
Long
May 06
$315500.00
-37.6%
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.
Grid Equipment
Long
May 06
$1389000.00
-44.9%
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.
Grid Equipment
Long
Aug 02
$271.58
+2.3%
Amazon's AWS is the key driver, with growth exceeding expectations and AI infrastructure investment expanding. Amazon can fund capex through strong cash flow from its e-commerce business, giving it a sustainable advantage in the AI race.
Hyperscalers
Showing 15 of 48 calls · sorted by mentions
Choose a mentions count to open ticker posts.
Choi Chang-gyu has 48 trade ideas tracked on Buzzberg across 46 tickers since May 2026. Win rate 36% across 42 evaluated calls, average return -7.6%. Ranked #1044 on the Buzzberg Alpha leaderboard. Most covered: 000660.KS, 005930.KS, ARM.
