Key Takeaways
On July 22, KOSPI staged an intraday surge of more than 6%, with Samsung Electronics (005930) and SK Hynix each jumping 6-9%, but both gave back most of those gains by the afternoon. The key detail is that this came just one day before Alphabet's U.S. earnings report. It wasn't so much that KOSPI rallied — rather, positions bought ahead of hyperscalers' next-quarter AI infrastructure spending figures were unwound before the actual results could be confirmed.
What Happened
KOSPI recorded an intraday sharp gain of over 6% that day, with Samsung Electronics (005930) and SK Hynix climbing as much as 6-9% intraday and driving the index's rise. However, buying momentum lost steam sharply in the afternoon, and both stocks (tickers) closed having given back most of their gains. Intraday swings of this magnitude typically stem from supply-demand (order flow) driven by hasty position adjustments ahead of an earnings-season event.
As it happened, this was just one day before U.S. tech giant Alphabet's earnings report. Alphabet, through Google Cloud, is one of the leading hyperscalers executing AI server investment, and the data center capex guidance expected from its upcoming results is seen as a leading indicator for the next quarter's order trajectory at Samsung Electronics (005930) and SK Hynix, both suppliers of HBM and server DRAM. In effect, investors jumped on the intraday rally only to take profits before the numbers that would justify it were even confirmed.
Background and Context
The reason the semiconductor sector keeps seeing intraday surges reversed by the afternoon is that the current rally is being driven by expectations rather than demand confirmed through earnings. HBM revenue is already reflected in SK Hynix's earnings, but if the level above it — aggregate hyperscaler capex — falters or slows, valuations are the first thing to wobble. With Alphabet's report marking the start of an earnings season that will be followed by capex guidance from Microsoft and Meta, the market is repeatedly betting on and then taking profits from numbers that have yet to be confirmed.
Impact on the Market and Stocks
- SK Hynix: As the stock (ticker) with the largest share of HBM revenue, whether hyperscaler capex guidance — including Alphabet's — holds up will directly determine the pace of capacity expansion for 12-high and higher-stack products, as well as its pricing power.
- Samsung Electronics (005930): With both foundry utilization rates and HBM qualification progress at stake, a re-rating will only gain traction if a DRAM price rebound and a foundry order recovery are confirmed simultaneously.
- Semiconductor equipment and materials stocks: For bonding/packaging equipment makers and wafer/substrate material suppliers, any delay in the timing of Samsung Electronics' and SK Hynix's capacity-expansion capex execution would likewise push back the timing at which they recognize new orders.
- KOSPI broadly: Since the two semiconductor stocks (tickers) carry substantial weight in market capitalization, index volatility expands accordingly, and on days like this one with a wide gap between intraday levels and the closing price, index-tracking funds' short-term gains and losses swing along with it.
Investor Checkpoints
- Whether data center capex guidance from hyperscalers — starting with Alphabet and followed by Microsoft, Meta, and others — comes in raised, maintained, or lowered.
- Whether SK Hynix's earnings report confirms concrete figures for next-generation HBM product yields and supply schedules.
- Whether Samsung Electronics (005930) discloses foundry utilization rates and new orders from major clients.
- DRAM spot price trends — whether actual price signals emerge to support the intraday sharp gain.
Outlook
If hyperscaler capex meets or exceeds market expectations, today's pullback is likely to be remembered as a pause before confirmation rather than a correction. Conversely, if capex guidance signals a slowdown, it will become clear — belatedly — that the current valuation was a multiple built on expectations rather than earnings, and the resulting correction could be larger than today's intraday pullback. The signal that determines which scenario plays out will emerge within the first few days of this earnings season.
Samsung Electronics (005930): Real-Time Data
Samsung Electronics (005930)'s most recent closing price was 260,500 won (+0.58% vs. the previous day), and the composite signal combining foreign/institutional investor supply-demand (order flow) with news and momentum reads 🟢 Buy-leaning. With foreign investor flows, news, and momentum all positive, this stock (ticker) is worth watching.
- ▲ Supply-Demand Continuity — Foreign investors net-bought for a 3rd straight day (+583.4 billion won)
- ▲ News Flow — 5 positive catalysts vs. 3 negative catalysts — positive catalysts prevail
Recent related news skews favorable, with 5 positive catalysts versus 3 negative catalysts.
※ Price and foreign/institutional investor supply-demand (order flow) data are provided by Korea Investment & Securities (KIS) and reflect figures as of publication time.
This article is automatically summarized and analyzed content based on the original news report. View original (Yonhap News Agency, Securities)
