Today was a rollercoaster ride, rising initially due to macro factors but ultimately closing lower. We managed to hold the 7000 mark, but unless the Middle East situation stabilizes quickly, it could continue to act as a negative factor.

📊 Korean Stock Market Closing Briefing - September 22, 2026

Reference: 2026-09-22 16:30 KST / Regular Cash·KOSPI200 Futures·Options Weekly Market Close

Today's briefing is based on HTS data provided by users after the market close on September 22nd, and cross-referenced with publicly available closing data confirmed up to 16:30. News articles also confirm KOSPI 7,017.91(+0.15%), KOSDAQ 834.38(-0.23%). The market initially surged past 7,170 driven by strong performance in US AI and semiconductors, but later retreated due to a rebound in international oil prices and profit-taking.

Today's Quote:
"We held the 7,000 mark but failed to break through 7,170. Foreign investors bought into the cash market, but the combination of declining futures prices, decreasing open interest (OI), backwardation, and Put buying suggests that a strong upward trend has yet to be confirmed."

① Today's Market at a Glance

The won-dollar exchange rate fell to around 1,360 won during the day, and WTI fell 4.5% due to expectations of US-Iran diplomatic relations and Saudi supply recovery prospects. However, the domestic stock market gave back a large portion of its gains as it cautiously watched for an afternoon oil price rebound. Yonhap News

★ Today's Key Structure

KOSPI +0.15% ↔ Futures -0.28% ↔ Basis -1.30 ↔ OI -424

→ The spot price alone looks solid, but the derivative market is definitely more conservative than the spot market.

② ★ Market Quant Score

Overall 58 / 100 → Neutral~Slightly Strong

Macro Quant Score: 62 / 100

The US market rose the previous day, with the Nasdaq surging about 2.3% to a record high, while WTI and the US 10-year Treasury yield fell together. The US 10-year Treasury yield fell to around 4.97%. This was undoubtedly favorable for the opening environment of the Korean stock market. News Today

However, oil prices remain a key macroeconomic variable that determines market direction.

③ Foreigners & Institutions: Net Buying/Selling

KOSPI

Public disclosure data also confirms the trend of foreigners net buying and individuals/institutions selling. There are some differences in amounts between certain public articles and HTS due to different aggregation scopes and closing time reflections. We have applied the final HTS value as a priority. NewsPim

KOSDAQ

★ Supply and Demand Judgment

KOSPI and KOSDAQ are completely different.

Large Caps = Foreigner Buying
Small & Mid-Cap Growth Stocks = Foreigner & Institution Selling Together

Therefore, today was more of a selective risk appetite (Risk-On) focused on large caps rather than a complete risk appetite.

④ ★ KOSPI200 Futures + OI + Basis + Program

Futures by Investor Type

Futures Structure

Intraday Flow

1,142.35 → 1,110.55 → 1,112.00

In other words, it's almost a close at the low.

However, foreigners net bought +3,019 billion won.

Here, OI decreased by 424 contracts.

★ Key Interpretation

Price↓ + Foreigner Futures Buying + OI↓

This combination is not typical of a new long position build (Long Build).

The more likely sequence is:

Existing short covering / hedge reduction > new Long build

.

If foreigners were truly making an aggressive bullish position, generally

Price↑ + Foreigner Buying↑ + OI↑

This combination would be more convincing.

That wasn't the case today.

Program Trading

★ This is a very important part.

Arbitrage selling was strong, but non-arbitrage spot basket buying was stronger.

Therefore, considering foreign spot buying together, it can be judged that there was capital inflow into Korean large-cap stocks themselves.

⑤ Options Market

Investment Entity Amount

Foreigner Combination

Futures +3,019 billion + Call -10 billion + Put +12 billion

This is very important.

Foreigners bought futures but in options they did not aggressively pursue upside and protected against downside risk.

Therefore, it is excessive to interpret foreigners' futures buying as a "bullish bet" outright.

Major Events

Put 1,050

→ Put 가격 상승에도 OI 감소.

새로운 대규모 하방 베팅 증가보다는 기존 포지션 조정 성격이 섞여 있습니다.

Put 1,090

→ 1,090 Put에서는 OI가 증가했습니다.

즉 현재 가격에 가까운 하방 구간에는 방어 수요가 증가했습니다.

PCR

정확한 전체 시장 거래량·OI 기준 PCR은 제공자료와 16:30 공개자료만으로 동일 기준 교차확인이 어려워 데이터 미확인으로 처리합니다.

⑥ 반도체 및 주요 주도주

오늘 시장은 개장 초 미국 AI·반도체 랠리를 그대로 반영했습니다. 그러나 종가 기준으로는 내부 차별화가 강했습니다. 삼성전자는 상승했지만 SK하이닉스는 하락했고, 코스닥에서는 일부 반도체 장비·부품주가 상대적으로 강했습니다. 뉴스핌

구조적으로는

대형 메모리 일방 상승 → 반도체 소부장·PCB·AI 인프라로 순환

하는 모습입니다.

이것은 반도체 추세가 무너진 것과는 다릅니다.

다만 SK하이닉스까지 다시 동반 강세를 보여야 반도체 전체 RS 재확장으로 인정할 수 있습니다.

⑦ ★ 고정 12개 섹터 Quant Score

8 ★ Top 15 Sectors & Key Stock Signals for Today

Applying the same fixed format you requested last week. This is today's market map, which comprehensively analyzes the market's overall price, trading volume, relative strength, supply and demand, and catalysts.

⑨ KOSPI / KOSPI200 Technical Structure

Today's candles are not good.

KOSPI

7,161 gap up → intraday 7,170 → 7,017.91

In other words, it is a large upper tail. The open coverage data also confirms that most of the intraday gains of over 2% were given back.

However, the fact that the closing price remained above 7,000 is meaningful.

Therefore:

Uptrend not damaged
Short-term overheating warning O
Confirmation of high point selling O

.

KOSPI200

Around 1,113 is a short-term pivot (Pivot).

Since futures are weaker than spot and backwardation has occurred, it is difficult to judge the trend strength based on the spot index alone.

⑩ ★ Elliott/Neely + Wyckoff + Volume Profile + Supply/Demand/OI/RS/Regime

⑩-1 Wave Structure

7,170 high → 7,017 closing price is similar to the slowdown in bullish momentum that can be seen in the late stage of a short-term 5 wave.

However, due to the defense of 7,000 + net buying by foreigners + buy orders for profit taking, the completion of the 5 wave is not yet confirmed.

⑩-2 Neely

Today's characteristics are:

Short rise time → Long fall time → Most of the gains given back

.

This increases the possibility of time adjustment or complex correction (Complex Correction) rather than a simple trend extension.

Therefore, instead of one sharp drop, we prioritize the possibility of:

A box with high volatility between 7,000 and 7,100

.

⑩-3 Wyckoff

Judgment

Re-accumulation 55 : Initial Distribution 45

Re-accumulation is still slightly dominant, but the difference is not large.

⑩-4 Volume Profile

즉 다음 거래일 가장 중요한 가격은:

1,110 → 1,120

입니다.

⑩-5 현물↔선물↔OI↔옵션

오늘 핵심 조합을 한 줄로 놓으면:

외국인 현물 +2,566억 ↔ 선물 +3,019억 ↔ 선물가격 -0.28% ↔ OI -424 ↔ Basis -1.30 ↔ Call -10억 / Put +12억

따라서 외국인 매수 = 공격적 강세라고 판단하기 어렵습니다.

현재 가장 자연스러운 해석은:

현물 선택적 매수 + 기존 선물 Short 일부 청산/헤지조정 + Put을 통한 하방보험 유지

입니다.

⑩-6 시장국면(Regime)

Overall Regime

Mid-term Upward Trend + Short-term Overheating Relief + Sector Circulation Maintenance + Derivatives Market Cautionary

⑩-7 Scenario

★ Key Points

Price↓ + OI↓ currently is not yet a strong signal for establishing new short positions (New Short).

On the contrary, if it changes to

Price↓ + OI↑ + Foreigner Futures Selling

the next trading day, the story will be completely different.

Then, you need to quickly increase the probability of scenario C.

⑪ Key Support and Resistance for the Next Trading Day

KOSPI

K200 Futures

⑫ ★ Most Important Risks to Watch Out For

★ We are particularly wary of the combination of US 10-year yield exceeding 5% and WTI crude oil price breaking through $100 simultaneously.

⑬ ★ Final Market Dashboard

⑭ ★ Today's Key Conclusion

Today is a day when we need to distinguish between "upward trend failure" and "trend collapse."

장 초반 KOSPI가 7,170선을 넘어섰다가 7,017.91까지 밀렸다는 사실은 분명 단기 경고입니다. 미국 반도체 랠리와 유가·금리 하락이라는 매우 좋은 출발조건을 받고도 상승분 대부분을 지키지 못했습니다. 뉴스핌

그러나 아직 본격적인 하락전환 증거도 부족합니다. 외국인은 KOSPI 현물을 매수했고, 비차익 프로그램도 약 +6,486억원 들어왔으며, 원화도 강했습니다. 가장 중요한 것은 선물 하락에도 OI가 -424계약 감소했다는 것입니다.

따라서 현재 시장은:

중기 상승추세 유지 → 단기 과열해소 → 7,000 부근 재축적 여부 확인 단계

로 판단합니다.

★ 다음 거래일 판단 공식

강세 확인

KOSPI 7,050→7,100 회복

• K200 선물 1,120 돌파

• 외국인 현·선물 동반매수

• 가격↑·OI↑

• 베이시스 정상화

이 조합이면 재축적(Re-accumulation) → 상승 재개 확률을 높입니다.

반대로,

경계 신호

KOSPI 6,980 이탈

• 선물 1,100 이탈

• 외국인 현·선물 동반매도

• 가격↓·OI↑

• Put OI 증가

• 백워데이션 확대

가 동시에 나오면 오늘과 전혀 다른 구조입니다. 이 경우에는 신규 매도 포지션 구축(New Short) + 와이코프 분산(Distribution) + 엘리엇 ABC 조정 확대 가능성을 우선적으로 점검해야 합니다.

최종 판정: Market Quant 58 / Macro Quant 62

Regime = 중기 상승 / 단기 과열해소 / 파생 중립~경계 / 섹터 순환매 지속

※ 그리고 이번에는 요청하신 대로 ⑧은 ‘당일 상위 15개 섹터·테마 + 핵심종목 + 신호 + 지속성’, ⑩은 파동·닐리·와이코프·거래량 집중구간·현선물/OI/옵션·RS·Regime·확률 시나리오까지 상세 분석하는 형식으로 복원했습니다. 이후 장 마감 브리핑에서도 이 두 섹션을 축약하지 않고 이 구조를 기준으로 유지하겠습니다.