Even as the Fed turned hawkish, money in Korea’s stock market rotated out of chipmakers and into defense, shipbuilding, and aerospace
🎧 Post Summary
The U.S. Federal Reserve raised its benchmark interest rate by 0.25 percentage points, from 3.75% to 4.00%, on September 17 Korean time — its first hike since July 2023, decided unanimously by all 12 voting members. The median year-end rate projection was also revised up from 3.8% to 4.1%, a hawkish signal. In response, South Korea’s KOSPI index jumped as high as 6,795 right after the open, but foreign investors sold more than 2 trillion won worth of stock, pulling the index down 0.04% to close at 6,715.41. The KOSDAQ, by contrast, closed up 0.76% at 822.18 on institutional buying. The standout story of the day was the defense and aerospace theme: Bitzro Tech and Nara Space Technology surged to near their daily limit, while large-cap defense names such as Hanwha Systems, HD Hyundai Heavy Industries, and Samsung Heavy Industries all rallied together. The rate hike weighed on high-valuation growth stocks like semiconductors, while capital rotated into defense stocks backed by solid earnings and order backlogs. The won weakened past 1,377 per dollar, and the government held an emergency macro-financial meeting that morning to review market conditions.
News that the U.S. Federal Reserve had raised interest rates for the first time in three years sent another jolt through Korea’s stock market. Yet the stocks that ran hottest today were neither chipmakers nor battery makers. It was defense and aerospace names — Bitzro Tech and Nara Space Technology — that hit their upper price limits, while large defense and shipbuilding stocks like Hanwha Systems, HD Hyundai Heavy Industries, and Samsung Heavy Industries surged together. Here’s a look at why the familiar “rate hikes are bad for stocks” playbook worked in reverse for one particular sector today.
The First Rate Hike in Three Years — What Changed
Following its two-day meeting, the Fed announced on the 16th (local time) that it would raise the federal funds rate target range from 3.50–3.75% to 3.75–4.00%. The hike itself was largely priced in — CME FedWatch odds had put the probability above 93% heading into the meeting. What rattled markets more was the path ahead: the updated dot plot showed the median year-end rate projection rising from 3.8% to 4.1%, fueling expectations of further hikes before year-end. The unanimous 12–0 vote and a more hawkish tone in the statement added to the pressure. Wall Street reacted overnight, with the Dow Jones Industrial Average falling more than 1% alongside broad weakness across all three major indexes.
KOSPI Slips, KOSDAQ Holds Up — A Day of Diverging Fortunes
The mood wasn’t bad at the open. The KOSPI started 0.91% higher at 6,779.02 and touched an intraday high of 6,795.53. But heavy foreign selling — more than 2 trillion won — erased those gains, and the index ultimately closed down 2.56 points (0.04%) at 6,715.41. Profit-taking in large-cap semiconductor names added to the downward pressure. The KOSDAQ told a different story: institutional buying pushed the index up 6.20 points (0.76%) to close at 822.18, with advancing stocks (945) far outnumbering decliners (662). In the currency market, the won weakened past 1,377 per dollar, prompting Deputy Prime Minister and Finance Minister Koo Yun-cheol to convene an emergency expanded macro-financial meeting that morning to review financial and foreign-exchange market conditions in the wake of the rate hike.

Defense & Aerospace: Today’s Real Star of the Market
The clear standout today was the defense, shipbuilding, and aerospace theme. Bitzro Tech hit its daily upper limit (30%), and Nara Space Technology climbed nearly as much. Among large caps, Hanwha Systems rose about 13%, Samsung Heavy Industries nearly 8%, and both HD Hyundai Heavy Industries and LIG Defense & Aerospace gained 6–7%. Aerospace parts maker Sensorview surged more than 20%, and Kenkoa Aerospace rose around 15%. That said, media coverage suggests it’s hard to pin the sector-wide rally on a single order win or policy announcement. Sensorview’s jump appears tied to news of a SpaceX test flight lifting aerospace component makers broadly, but the gains elsewhere look more like sector-wide buying interest than reactions to individual news.
Why Defense, of All Sectors — The Logic of Rotation
Rate hikes typically hit growth stocks hardest, since they discount future earnings back to present value — and high-valuation sectors like semiconductors are especially sensitive. Sure enough, Samsung Electronics closed lower and SK Hynix also weakened today, with clear profit-taking among large-cap chip names. Defense stocks, by contrast, tend to respond more to earnings and order momentum than to interest rates, since their order backlogs already provide some visibility into revenue years out. Persistent geopolitical tension over the past several months — the Russia-Ukraine war, instability in the Middle East — and the resulting global trend toward higher defense spending have also supported investor sentiment toward Korean defense stocks. Even within semiconductors, though, sentiment wasn’t uniform: SK Hynix drew inflows on reports it is in talks with Intel over U.S.-based memory chip production, showing meaningful stock-by-stock divergence even within the same sector.
What to Watch This Week
With the Fed’s dot plot leaving the door open for further hikes this year, markets are likely to stay highly sensitive to inflation data and Fed commentary heading into the next FOMC meeting (scheduled for October 27–28). For Korean equities, foreign fund flows and the won-dollar exchange rate are likely to remain the key sources of volatility in the near term. As for the defense theme, several small-cap names that hit their upper limit today already look short-term overheated, so it’s worth watching how the gap-up open and profit-taking play out in the next session.
Investor Notes
- Small-cap defense stocks that hit their upper limit in a single day carry short-term overheating risk — checking earnings and order backlogs is safer than chasing the rally.
- It’s too early to call this hike the end of the tightening cycle; with further hikes still possible this year, investors should brace for continued volatility.
- Analysts note that no single, clearly confirmed catalyst explains today’s broad defense-sector rally — it’s worth distinguishing between thematic buying and each company’s actual defense-business exposure and order status.
- A weaker won can affect import prices and foreign investment flows, so it’s worth tracking the exchange rate alongside the index.
In the end, today didn’t follow the simple “rate hikes are bad for stocks” script. The index itself caught its breath, but underneath, capital clearly rotated — from semiconductors to defense, from growth to earnings-backed value. Still, the sharper a stock’s short-term rally, the bigger the risk of a pullback — a point worth keeping in mind.
Sources
- Newspim — “Fed Raises Rates 0.25%P for the First Time in 3 Years” (newspim.com)
- Shinailbo — “[Market Close] KOSPI Dips Slightly on Rising U.S. Treasury Yields and Foreign Selling, Closes Near 6,700” (shinailbo.co.kr)
- Kyungjae Times — “Foreign Selling of 2 Trillion Won Leaves KOSPI Barely Holding 6,700” (ket.kr)
- EBN — “KOSPI Large-Caps Mixed: Financials and Defense Strong, Battery and Chip Stocks Diverge” (ebn.co.kr)
- CBC News — “Defense Stocks Broadly Higher: Sensorview Up 21%, Kenkoa Up 14%, Hanwha Systems Up 7%” (cbci.co.kr)
- Newspim — “[Stock Watch] Aerospace Stocks Catch Fire as Sensorview Jumps 23% on SpaceX Test Flight News” (newspim.com)
- Money Today — “‘It Was Expected, But…’ Why September’s FOMC Still Weighed on Stocks” (mt.co.kr)


