SK Hynix Down 5.72%, Hanmi Semiconductor Down 4.72%: Why Did Chips Fall?

SK Hynix -5.72%, Hanmi Semiconductor -4.72%.

Let's start with why SK Hynix fell.

Headlines say HBM-related stocks were hit together.

Data collected at 2026-10-20 14:30 KST.

Intraday figures can keep changing.

Retail investor:

"I was happy yesterday, and now this?"

The index rose yesterday.

But chip stocks were pressed on their own.

How did the index do yesterday?

(Source: Confirmed close on October 19)

KOSPI: 5,768.01 (+1.76%)

KOSDAQ: 808.89 (+1.78%)

Both indexes closed up more than 1%.

These are yesterday's confirmed closes, not today's intraday numbers.

Why did SK Hynix fall?

(Source: News headlines)

SK Hynix: -5.72%

Hanmi Semiconductor: -4.72%

Headlines report that HBM-related stocks slid together.

HBM is high-performance memory used in AI servers.

When the leader falls, equipment stocks often wobble too.

Headlines alone cannot pin down the cause.

How did US chips do?

(Source: Sector moves in recent trading day)

IT and Semiconductors: -3.02%

Communication: -1.89%

Energy: +2.52%

Chips took the biggest hit in the US.

Energy rose the same day.

Money appears to have shifted.

A separate headline also points to AI funding worries dragging global tech lower.

Hanmi Semiconductor's drop, how far does it go?

Another headline reported a different decline for Hanmi Semiconductor.

Figures can vary depending on when a report was published.

So we start with confirmed closing numbers.

So, up or down?

Pressure side

• SK Hynix - -5.72%, HBM leader under strain
• Hanmi Semiconductor - -4.72%, equipment stocks weak together
• US IT and Semiconductors - -3.02%, sector weakness the prior day

Holding up side

• KOSPI - +1.76% prior day, index rebound
• KOSDAQ - +1.78% prior day, closed higher together
• US Consumer Staples - +1.08%, defensive demand confirmed

Treat these as reference only.

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

This article is for information only and is not investment advice.