Market Briefing) Today's Market Briefing

72

🇰🇷 Korea Stock Market 4:30 PM Closing Briefing — September 14, 2026

Today is a day to check whether the market regime has actually deteriorated since mid-September, rather than just a simple adjustment. Based on the final value of user HTS, KOSPI 6,684.37(-3.26%), KOSPI200 1,050.83(-3.61%), KOSDAQ 806.79(-1.69%), K200 December futures 1,048.40(-3.67%). The KOSPI closing price matches the publicly available closing data exactly, with Samsung Electronics -4.05% and SK Hynix -6.35% leading the index decline. Seoul Economic Daily

The most important thing is the derivative combination.

Futures -3.67% + OI +1,069 + Foreigner Futures -783.1 billion + Foreigner KOSPI Spot -3.9121 trillion + Basis -2.43p

The price↓ + OI↑ + foreigner spot and futures selling together, first confirmed on 9/11, was repeated more strongly today. Therefore, it is becoming difficult to see it as a simple Long liquidation like the previous expiry week, and we are raising the possibility that new Short positions by foreigners or an increase in active Hedge Shorts for existing spot exposure.


① Today's Market at a Glance

KOSPI 6,684.37(-3.26%) and KOSDAQ 806.79(-1.69%) are also confirmed in the publicly disclosed closing data. Foreigners reduced their risk exposure centered on large technology stocks as concerns over oil prices, interest rates, and AI regulations grew simultaneously. Seoul Economic Daily

The global environment is also very bad. According to Reuters, Brent rose to about $107~108, WTI rose to about $103, and the US 10-year yield approached 5% at about 4.97%. The probability of a rate hike by the Fed this week has also been reflected up to about 86%. Reuters


② Today's Market Quant Score

42 / 100 — Risk-Off

Downgraded again from the 54 point level on 9/11.

Item

9/14 Final

Change

Judgment

KOSPI

6,684.37

-3.26%

🔴🔴

KOSPI200

1,050.83

-3.61%

🔴🔴

KOSDAQ

806.79

-1.69%

🔴

KOSDAQ150

1,369.05

-2.15%

🔴

K200 Dec Futures

1,048.40

-3.67%

🔴🔴

Dec High/Low

1,098.30 / 1,045.85

Low Close

🔴

Basis

-2.43p

Discount Expansion

🔴

OI

129,661

+1,069

⚠️ New Position Increase

VKOSPI

46.85

+1.23%

🔴

USD/KRW

About 1,347.2 Won

Won Weakness

🔴

WTI

About $102.67

+2% Range

🔴🔴

Macro Quant Score: 17 / 100

This appears to be the worst level we've seen since September began.

Four unfavorable factors for the Korean stock market are currently occurring simultaneously.

**US 10Y ≈ 5%

  • WTI > $100

  • Fed potential for additional rate hikes surging

  • AI investment/regulation concerns**

In particular, as executives of major AI companies raised the need to slow AI development speed, Asian AI and semiconductor stocks fell broadly. Reuters reported that AI-related stocks, including SK Hynix and Japan's SoftBank, were simultaneously hit hard. Reuters


③ Foreign Investor/Institutional Cash Supply and Demand

Based on final HTS data:

Components

Score

Judgment

Price Trend

31

KOSPI -3.26%

KOSDAQ

44

Relatively less decline

Foreigner Spot

12

-3.91 trillion

Institution Spot

24

-1.72 trillion

Foreigner Futures

25

-7,831 billion

Institution Futures

68

+6,888 billion

OI Structure

27

Price↓ + OI↑

Basis

27

-2.43

Program

22

Overall/Non-Arbitrage Continued Selling

Option

48

Reduction of Foreigner Dual Options

Market Breadth

28

KOSPI Declining Stocks 590

Semiconductor RS

19

Weakest Group

VKOSPI

31

46.85

Exchange Rate

35

Won Weakness

Macro

17

Oil/Yield/AI Risk

Market

Retail

Foreign Investors

Institutions

KOSPI

+4조1,573억

🔴 -3조9,121억

🔴 -1조7,220억

KOSDAQ

+1,503억

-1,226억

-351억

In public reports, KOSPI foreign investors showed approximately -3.91 trillion won and institutions approximately -1.69 trillion won, which is essentially consistent with user HTS data. Foreign investors had 4 consecutive trading days of net selling, and institutions also showed 5 consecutive trading days of selling, according to reports. Seoul Economic Daily

Important Changes

Previously, there were days when institutions would absorb sales even when foreign investors were selling.

Today:

Foreign investors -3.91T + Institutions -1.72T

it is.

Retail investors bought +4.16 trillion won, but KOSPI fell -3.26%.

This is not favorable supply and demand in that institutional risk absorption is weakening and retail is absorbing selling volumes.

In the latter part of the trading day, HTS supply and demand also showed continued net selling by foreign investors. There were momentary buying reversals like 15:20 -159억 → 15:30 +354억 → 15:40 -18억, but they were not enough to reverse the day's accumulated large-scale selling.


④ ★ KOSPI200 Futures · OI · Basis · Program

This is the key to today's analysis.

K200 December Contract Supply and Demand

Subject

Net Buying Amount

Individual

+1,237 billion

Foreigner

🔴 -7,831 billion

Institution

🟢 +6,888 billion

Financial Investment

+1 trillion 5,455 billion

Private Equity Fund

-8,456 billion

Futures are:

1,098.30 → 1,045.85 → 1,048.40

Ended.

The closing price was only about 2.55p different from the low.

In other words, the rebound during the day almost failed.


OI

Previous day:

128,592

Today:

129,661

Increase:

+1,069 contracts

.

During the day, OI rose to 131,853.

In other words, during the morning decline:

About +3,261 contracts increased in new positions

before some were liquidated in the afternoon, ending with a net increase of +1,069.


Price↓ + OI↑ + Foreigner Futures↓

The important thing here is that OI is the total market OI, so:

OI +1,069 = Foreigner Short +1,069

is not necessarily true.

However, if we estimate the probability based on today's combination:

Position Structure

Probability

New Foreigner Short + New Institution/Financial Investment Long

40%

Foreigner Spot Risk Hedge Short + Counterparty New Long

30%

Existing Long Liquidation + New Short Mix

15%

Private Equity Short / Financial Investment Long Basis Trade

10%

Simple Position Liquidation

5%

In other words, we assess the possibility of a new Short/Hedge Short total as about 70%.

This does not mean that the direction is Bearish 70%, but rather that the proportion of new Shorts and Hedges in Foreigner Futures sales has increased compared to simple Long liquidation.


9/11 → 9/14 Structure Change

9/11

  • December futures 1,088.30

  • OI 128,592

  • Foreigner futures selling

  • Basis -1.92

9/14

  • 1,048.40

  • OI 129,661

  • Foreigner futures -7,831 billion

  • Basis -2.43

In short:

Price↓ → OI↑ → Basis deterioration → Continued foreigner selling

This is the case for two consecutive days.

It has become difficult to attribute this simply to maturity effects.


Program Trading

On HTS graph:

  • Overall: Large-scale net selling

  • Arbitrage: Net selling

  • Non-arbitrage: Largest net selling

  • Cumulative selling continued until the afternoon.

It is.

The overall cumulative amount on the graph appears to be around -2.5 trillion won or more, but since the exact final amount in Korean won has not been confirmed in public data:

Overall: Data unconfirmed
Arbitrage: Data unconfirmed
Non-arbitrage: Data unconfirmed

It will be treated as such.

The important thing is the direction, and the fact that foreigner spot large-scale selling and program non-arbitrage selling are in the same direction.


⑤ Options Market

Based on HTS amount:

Subject

Call

Put

Individual

-700 million

+1.6 billion

Foreigner

-400 million

-1.6 billion

Institution

+1.1 billion

+200 million

There is an important point.

Foreigners did not buy Put today, but rather net sold -1.6 billion.

Therefore, looking only at options:

“They strongly bet on further decline”

cannot be said.

Call -4 + Put -16 suggests the possibility of two-way option exposure or reduction in volatility exposure as a priority.

In other words, today's key evidence for weakness is:

Spot + Futures + OI + Basis + Program

It is.


Key 1,090 events

HTS:

Option

Price

Change

Volume

OI

Call 1,090

28.40

-41.86%

85

209

Put 1,090

70.00

+52.58%

8

93

Total Market PCR:

Data Unavailable

OI PCR:

Data Unavailable

Trading volume is small, so market direction should not be judged by a single event.


⑥ Semiconductors and Key Leading Stocks

Today's KOSPI decline was centered on semiconductors·AI.

Public closing data:

  • Samsung Electronics 249,000 won -4.05%

  • SK Hynix 169.7 million won -6.35%

  • Samsung Electro-Mechanics -4.50%

Seoul Economic Daily

The AI fundamentals themselves did not collapse in a single day. Just a few days ago, OpenAI announced that it was expanding its next-generation semiconductor collaboration with Samsung Electronics, and the AI memory supply structure of Samsung Electronics and SK Hynix is also being maintained. Reuters

However, the current market problem is:

Earnings, not Multiple

.

With 10-year yields at 5%, oil prices above $100, and regulatory concerns over the pace of AI investment, there is a situation where both the long-term cash flow discount rate and Capex expectations for AI companies are being lowered simultaneously.

In addition, Samsung Electronics and SK Hynix's refusal to agree to a 25 trillion won advance payment proposal from Korea Electric Power Corporation (KEPCO) related to the semiconductor cluster power grid was also reported today. This can be seen as meaning that the long-term funding structure for AI·semiconductor power infrastructure has not yet been settled. Reuters


⑦ 12 Fixed Sector Quant Score

Financial stocks showed exceptional relative strength today. Woori Financial +4.99%, Hana Financial +2.18%, KB Financial +2.08% reflected expectations for improved net interest margins due to high interest rates. Seoul Economic Daily

Automobiles faced additional headwinds besides the market decline. Concerns about intensified competition in the US market for Hyundai and Kia were raised as the US President mentioned the possibility of Chinese automakers producing locally in the US. Seoul Economic Daily


⑧ Major Stock Signals

Sector

Score

Features/Supply and Demand

RS

Short-Term Outlook

Finance·Securities·Insurance

76

Benefit from rising interest rates

★★★★★

🟢

Defense·Aerospace

68

Geopolitical premium

★★★★

🟢

Shipbuilding

66

Expected LNG/tanker demand

★★★★

🟡🟢

Construction·Nuclear Power·Energy

59

Energy security vs. interest rates

★★★

🟡

Electrical Equipment

55

Long-term demand, discount burden

★★★

🟡

Bio·Pharmaceuticals

51

Defensive

★★☆

🟡

Robots·Machinery

47

High Beta pressure

★★

🟠

Secondary Batteries

46

Avoidance of risky assets

★★

🟠

Cosmetics·Beauty

44

Supply and demand burden

★★

🟠

Automobiles·Parts

39

Competition+high prices

★★

🔴

Internet·AI·SW

32

AI regulation+interest rates

★

🔴

Semiconductors·AI

27

AI concerns+foreign selling

★

🔴🔴

Item/Group

Signal

Judgment

Samsung Electronics

🔴🔴

Foreigner Risk-Off + AI Multiple Compression

SK Hynix

🔴🔴

High Beta AI Adjustment Centered

SK Square

🔴

Hynix Beta

Samsung Electro-Mechanics

🔴

Growth Stock Discount Rate Shock

HD Hyundai Electric

🟡

Long-Term Structure Effective

LS ELECTRIC

🟡

Trend Confirmation Required

Hyosung Heavy Industries

🟡

Interest Burden

KB Financial

🟢🟢

High Interest Rate Relative Benefit

Hana Financial

🟢🟢

Financial RS Rise

Woori Financial

🟢🟢

Strong Relative Strength Today

Hanwha Ocean

🟡🟢

Energy·Shipbuilding Structure

Hanwha Aerospace

🟢

Geopolitical RS

Hyundai Motor

🔴

High Oil Prices + China Competition Concerns

Robot Stocks

🟠

High Beta

Celltrion/Bio

🟡

Possible Defensive Play


⑨ KOSPI / KOSPI200 Technical Structure

KOSPI has now failed to recover the 7,000 line and fallen to around 6,700.

K200 December Futures:

1,098.30 → 1,045.85 → 1,048.40

.

Compared to the closing price of 1,088.30 on 9/11, it has fallen:

-39.9p / approximately -3.7%

.

Technically, it is a clear Lower Low + Lower High structure.


Volume Profile

The most important price range on HTS today is:

Price Range

Trading Volume Proportion

1,051.91~1,049.75

22.97%

1,054.08~1,051.92

17.17%

1,049.74~1,047.58

13.34%

1,056.25~1,054.09

11.12%

1,064.93~1,062.77

9.25%

1,060.59~1,058.43

8.08%

A significant portion of the trading was concentrated in:

1,047.5~1,054.1

.

The closing price of 1,048.40 is at the lower end of the Value Area.

Therefore, for the next trading day:

  • Recovery to 1,050~1,054 = First normalization

  • Break below 1,047 = Resumption of weakness

  • Break below 1,045.85 = New low

.


⑩ Elliott/Neely + Wyckoff + VP + Supply & Demand + OI + RS + Regime

🔴 Scenario A — Continuation of Downward Impulse

55% — Base Case

This is the highest probability scenario currently.

Reasons:

  • Price Lower Low

  • Foreigners selling both spot and futures

  • Increasing OI

  • Negative Basis (-)

  • Programmatic net selling

  • Semiconductor RS collapse

  • US10Y ≈5%

  • Oil >$100

Path:

1,048 → 1,045

→ 1,038~1,040

→ 1,025~1,030

.

Invalidation

Recovery above 1,060 + Foreigners net buying futures + Basis improvement + Increasing OI


🟡 Scenario B — Technical Rebound After Selling Climax

30%

Because the price drop and the scale of foreigner spot selling today are very large, there is a considerable possibility of an oversold rebound.

From a Wyckoff perspective, tomorrow could be a candidate for Spring / Selling Climax.

Conditions:

  • 1,045~1,048 Support

  • Decrease in Foreigner Futures Selling

  • OI Decrease or Stabilization

  • 1,054 Recovery

  • 1,060 Breakthrough

Rebound Target:

1,060 → 1,067 → 1,075

Invalidation

1,040 Breakaway


🟢 Scenario C — Transition to a New Bullish Structure

15%

Still Low.

The necessary condition is not simply an index rebound.

**Price↑ + OI↑**

  • Foreigner Futures↑

  • End of Foreigner Spot Selling

  • Basis Recovery near 0**

All of these must occur simultaneously.

Key Price:

1,075~1,080

.

Until then, the rebound is more likely to be seen as a Bear Market Rally / Technical Rebound.


⑫ Next Trading Day Key Support & Resistance

K200 December Futures

Price

Meaning

1,075~1,080

🔴 Trend Reversal Line

1,065~1,067

🔴 Strong Resistance

1,058~1,060

🔴 1st Rebound Target

1,052~1,054

⭐ POC/Value Recovery

1,048~1,050

Current Pivot

1,045~1,046

🔴 Today's Low

1,038~1,040

🟠 1st Decline Target

1,025~1,030

🔴 Major Support

1,010~1,015

🔴 Tail Risk

KOSPI

  • 6,800~6,850: First Strong Resistance

  • 6,700~6,720: Recovery Needed

  • 6,650~6,680: Current Support Zone

  • 6,550~6,600: Next Major Support

  • 6,450~6,500: Key Defense in Case of Decline Expansion


⑫ Most Important Risks to Watch For

1. US 10-Year Treasury Yield Breaks 5%

Currently, it is right around 4.97%. If it settles above 5%, there could be an additional discount rate shock for growth assets with long durations like AI and semiconductors. Reuters

2. Brent $110 → $120

The problems with the Saudi East-West pipeline and the increasing transportation risks in the Red Sea and Hormuz are simultaneously growing. Reuters reported that shipping costs and supply risk itself are expanding.

Reuters

3. Fed September Meeting

The market is almost reflecting a 25bp hike as the base scenario. What's important is not whether there will be a hike, but additional guidance on further hikes. Reuters

4. Continued Foreign Selling of Spot and Futures

This is the most dangerous domestic signal today.

And on the next trading day:

Foreigners Spot -

  • Futures -

  • OI ↑

  • Basis (-)

If this repeats, the strength of confirmation for a downward regime will be quite high.


⑬ Final Market Dashboard

⑭ Today's Key Conclusions

Today is a day when the important warning stage has been raised by one more step in the September market.

The key figures are:

KOSPI -3.26%
K200 -3.61%
K200 December futures -3.67%
Foreigners' spot -3 trillion 9,121 billion won
Institutions' spot -1 trillion 7,220 billion won
Foreigners' futures -7,831 billion won
Institutions' futures +6,888 billion won
OI +1,069
Basis -2.43

.

Since the OI decreased rapidly before the September expiration, we initially interpreted it as Long liquidation·expiration Deleveraging.

Things are different now.

Price↓ + OI↑

Foreigners' spot↓ + futures↓

Basis negative (-) expansion

Non-profit program selling

Semiconductor RS plunge

This combination has been confirmed for the second time following September 11th.

Therefore, we must now include the possibility that **"new Short positions or active Hedge Shorts are actually accumulating"** in our base scenario.

However, we will not be overly pessimistic. Foreigners did not actively buy Put options today, and the OI increase of +1,069 contracts is not an explosive level. Therefore, it is still **not at the stage to definitively confirm a medium-term Bear Market**.

The four things I will be watching most closely on the next trading day are:

① Whether K200 defends 1,045
② Whether foreigners continue to sell futures contracts
③ Whether OI increases further
④ Whether the Basis improves from -2~-3p

The most dangerous combination is:

Breakthrough of 1,045 + Foreigners' spot and futures selling + OI increase + Further deterioration of Basis

.

In this case, I will lower Market Quant by **40 points below** and clearly set the Regime to a **Bear Trend**.

Conversely,

Support at 1,045 → Recovery to 1,054 → Breakthrough of 1,060 + Foreigners' futures buying switch + OI increase

If this occurs, we can reassess today's plunge as the **beginning of a rebound after a Selling Climax**.

Final Judgment

Market Quant 42 / Macro Quant 17

Rather than hastily judging this as an opportunity to "buy good stocks cheaply," we are now at a stage where we need to confirm whether the combined selling of foreigners' spot and futures contracts will actually lead to a new Short Regime. The warning on September 11th has been strengthened today. While short-term rebounds are always possible, until 1,060~1,067 is regained, it is important to distinguish between rebounds and trend reversals. Seoul Economic Daily

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재테크당

KR | ID | EN
  • IDR
  • KOR
7.52 ▼ -0.01

2026.10.09 KEB 하나은행 고시회차 3918회

다가오는 한인 행사일정

  • 등록 된 일정이 없어요!

Item

Status

Market Quant

🔴 42/100

Macro Quant

🔴🔴 17/100

Regime

Risk-Off / Bearish

KOSPI

🔴🔴

KOSDAQ

🔴

Foreign Stock

🔴🔴

Institutional Stock

🔴

Foreign Futures

🔴🔴

Institutional Futures

🟢

OI

🔴 +1,069

Price/OI

🔴 Price↓ + OI↑

Basis

🔴 -2.43

Program

🔴🔴

Option

🟡

VKOSPI

🔴

USD/KRW

🔴

WTI/Brent

🔴🔴

US10Y

🔴🔴

Semiconductor·AI

🔴🔴

Finance

🟢

Shipbuilding·Defense

🟡🟢

New Long

❌ Unconfirmed

New Short/Hedge

⚠️ High Possibility

Chase Buying

🔴

Technical Rebound Possibility

🟡