Korean stocks, today's flow at a glance

What moved U.S. markets overnight was not earnings but the wait for data. Ahead of the September consumer price report due Wednesday, investors held back, and Fed officials' remarks did the rest of the work on rates. After New York Fed President John Williams said one more hike this year may be appropriate but none looks necessary next year, the 10-year Treasury yield eased into the 5.2% area and the dollar, which had hit a 17-month high the day before, pulled back, according to investingLive. Oil went the other way, with West Texas Intermediate settling in the $94 range as Middle East supply risk resurfaced.

At the index level it looked like a quiet day, but underneath it was split. The Dow fell 0.35%, the S&P 500 was close to flat at -0.02% and the Nasdaq lost 0.15%, with banks and energy holding up as much as semiconductors dragged down. Reuters put the Philadelphia Semiconductor Index 0.23% lower, a fifth straight losing session.

Two stories drove that. One was China's CXMT laying out plans for denser server memory, which pressed Micron and the NAND and hard-drive names for a second day. The other was the start of third-quarter bank earnings, where beats and misses were mixed and the market took the batch coolly. Apple, meanwhile, set an intraday record high and finished slightly higher.

For today's Korean session, the gap between the two markets is the thing to watch. The same CXMT headline knocked the Kospi down more than 5% the previous day, while the decline in U.S. memory and chip names was far smaller. The two markets priced the same fear very differently, so it is safer to treat semiconductors as open to both a bounce and more volatility. The rise in oil may come back as a cost burden for refiners and chemicals.

That is what the reporting confirms; the rest is interpretation. Index moves, individual stock moves and the Fed remarks were verified across several outlets, but whether Seoul overreacted remains a hypothesis rather than a judgment. Wednesday's September CPI is the variable that will reset the direction of rates and the dollar.

The index fell more than 5%, but the share of declining stocks was not as extreme as that drop suggests. The KOSPI closed 5.46% lower at 6035.35 and the KOSDAQ 1.43% lower at 837.03; on the KOSPI 256 stocks rose and 622 fell, while on the KOSDAQ 527 rose and 1142 fell. The KOSPI's decline being nearly four times the KOSDAQ's means this was less a market-wide collapse than a drop driven by a handful of heavily weighted names. Even so, only 3 stocks set 252-session highs against 53 new lows.

On industry averages the hardest-hit group was not semiconductors but cosmetics, and the semiconductor industry average was down just 0.41%. What broke the index was not the whole industry but large caps such as SK hynix and Samsung Electro-Mechanics, while within the same semiconductor group the back-end inspection and equipment names Systems Technology Incorporated, INTEKPLUS and DOOSAN TESNA filled the top of the day's gainers. In cosmetics, APR posted its largest decline since listing as third-quarter operating profit expectations were cut, dragging the whole industry down. Industry moves and individual stocks are listed below.

Where the money leaving equities went showed up first in rates. The three-year government bond yield fell 6.4bp to 3.857% and the ten-year fell 7.7bp to 4.229%, while gold held near record territory at 4,181.83 dollars. On the currency, our collected figure is 1,335.8 won while closing reports put it at 1,345.1 won, so the direction cannot be settled. Investor deposits stood at 100.1099 trillion won as of October 8, down 269.7 billion won from the previous observation, while credit financing balances rose 294.6 billion won to 33.8113 trillion won, a combination of cash draining out while leverage built up. KOSPI non-arbitrage program trading saw 2.2243 trillion won of net selling, bringing the five-session total to 7.4844 trillion won, and Korea's weight in the MSCI Emerging Markets index was 20.73% as of October 9, down 1.16 percentage points in a week.

The trigger was widely attributed to material arriving from abroad. Asia Today and Digital Times reported that China's ChangXin Memory Technologies pushing into server DDR5 spread into concern about memory oversupply, and The Fair News pointed to warnings from BlackRock and the International Monetary Fund about risks in AI investment. According to Yonhap Infomax foreign investors sold a net 4.5 trillion won or more on the main board, and Maeil Business Newspaper argued that with Taiwan and Japan falling only around 1% on the same news, it was the weight of semiconductors inside the index that deepened Korea's decline. Where money did stay was entertainment and shipping. ACE KPOP Focus rose 1.85% to rank among the best-performing ETFs and HYBE gained 4.41%, while the industry still leading on our chain scores is semiconductors, so the day's returns and relative strength are telling different stories. SK Gas, the representative stock, disclosed a trust contract to buy back its own shares and finished down just 0.55%.

The index closes and percentage moves were confirmed at the same values across several closing reports, and the industry averages, individual stock returns and the counts of new highs and lows are figures we calculated ourselves from closing prices. The concern over Chinese memory oversupply, the warnings on AI investment and the supply vacuum left by the end of share buybacks are readings by brokerages and the press and appear hard to treat as settled. The exchange rate is left as an unclear item because our collected value differs from the reported close. Because of disclosure lags, the MSCI weights are as of October 9 and investor deposits and credit financing balances as of October 8.