KOSPI Plunges 7.57% as Oil and US Inflation Hit Chips Hard, Why?

KOSPI -7.57%, KOSDAQ -7.65%. Nearly 7% in a single day.

The October 15 crash comes down to two words: oil, and US inflation.

Let's look at the numbers calmly.

Intraday data for today (16th) was not captured as confirmed figures as of the 14:30 collection time on October 16.

So we start with yesterday's confirmed close and what drove it.

How Far Did We Fall at the Close?

KOSPI: 5,554.22 (-7.57%)

KOSDAQ: 760.82 (-7.65%)

Both markets fell by almost the same margin.

Large caps and small-to-mid caps were hit alike.

Why Did US Inflation Hit Our Stocks?

CPI is the US consumer price index, a gauge of how much prices have risen.

Hot inflation readings make it harder for the Fed to cut rates.

Polymarket odds of a hold at the October meeting: 84%

The market is leaning toward no rate cuts for now.

When rate pressure builds, expensive growth stocks get shaken first.

Why Did Chips Take the Hardest Hit?

US IT and semiconductors: -2.98%

Chip selling deepened on inflation data, and headlines said Nvidia was weak.

Concerns over AI funding also dragged global tech stocks lower.

At home, Samsung Electronics and SK Hynix weakness shook HBM-related names too.

Hanmi Semiconductor drew headlines for an 8%-plus plunge.

With chips carrying large index weight, KOSPI had little room to hold up.

Was the KOSDAQ Crash for the Same Reason?

The main thread is the same.

Inflation shock pulled money out of risk assets across the board.

Crypto followed the same pattern.

Bitcoin hovering near $80,000, forced liquidations: $483 million

Secondary batteries were rattled by headlines on rising lithium supply and softer EV demand.

Batteries dominated the top of 3-month ETF returns, but momentum has faded recently.

Investor:

"So there's nowhere to hide..."

The US market offers a hint.

Healthcare: +2.53%

Consumer staples: +2.22%

Money rotated into sectors less tied to the economic cycle.

Money didn't vanish from the market; it just changed seats.

So, Up or Down?

Weighing on the market

• US IT and semiconductors: -2.98%, tech selling continues
• Hold bets on rates: 84%, rate-cut hopes fading
• Crypto forced liquidations: $483 million, risk aversion spreading

Holding up

• US healthcare: +2.53%, money moving into defensive sectors
• US consumer staples: +2.22%, rotation rather than exit
• Bitcoin below $50,000 "No": 92%, skeptical of a further collapse

Today, I'm watching first whether chips recover some of yesterday's losses at the close.

For US inflation-related schedules, check the market calendar.

Please treat this as reference only.

PickStock 💡

※ Investment decisions and responsibility rest with the investor.
※ Figures are as of the time of writing and may change.
※ This article is for information only and is not investment advice.