3-Line Briefing
- Forecasts suggest the KOSPI could trace a gentler "square-root" rebound rather than a V-shaped recovery after its sharp drop (plunge).
- The first driver is the lower valuation resulting from the sharp drop (plunge) and falling interest rates. The mere fact that stocks have gotten cheaper can attract short-term buying.
- However, the second leg requires confirmation from corporate earnings and foreign investors' supply-demand (order flow). A price rebound and a return to an uptrend are two different things.
What's Changing
Saying the KOSPI has gotten cheaper is not comfort for investors — it's a condition. After a sharp drop (plunge), when multiples fall and interest rates decline, the burden of the discount rate eases. At this point, the market first buys the bottom in price-to-book ratio and price-to-earnings ratio. But the term "square-root rebound" is really about a speed limit. It means that while the market may retrace part of the sharp decline, it's difficult to return straight to the previous highs unless earnings expectations follow.
The key point of this story is less about the KOSPI's level itself than about the sequence of the rebound. Falling interest rates give growth stocks and high-multiple industry sectors room to breathe. At the same time, they can also generate a technical recovery in oversold large-cap exporters and financial stocks. But if the reason rates are falling is an economic slowdown, the story changes. The discount rate falls, but earnings estimates fall along with it. What the market has already priced in is the price decline; what it has not yet fully priced in is the extent of the earnings downgrade.
Korean investors, therefore, should not view the rebound as a single block. The first phase is valuation restoration. The second phase is earnings verification. The third phase is the sustainability of foreign capital. If the won stabilizes and semiconductor earnings forecasts hold up, foreign investors could buy back into the KOSPI. Conversely, if the exchange rate becomes volatile, bargain-hunting will stall in the face of currency-translation losses.
Numbers and Context
The key figure the original report points to is a shape. Not a V, but a √ (square root). In financial markets, that distinction matters greatly. A V-shape is a path that recovers at the same pace as the decline. A square-root path is one where the slope flattens after an initial rebound. It reflects the judgment that there is a time lag between the phase driven by cheaper prices and the phase driven by improving earnings.
Falling interest rates act on KOSPI multiples first. When government bond yields decline, the relative appeal of stocks increases. However, Korea's leading stocks are generally sensitive to export conditions and the exchange rate. Semiconductors, autos, and financials cannot be explained by interest rates alone. For semiconductors, prices and shipment volumes matter; for autos, North American demand and the exchange rate matter; for financials, net interest margin and loan-loss provisions determine earnings. This is why the square-root rebound theory carries weight.
Stocks to Watch: Winners and Losers
- Samsung Electronics (005930): The large-cap stock (ticker) most exposed to foreign net buying in a KOSPI rebound. Falling interest rates are favorable for its multiple, but whether the rally is sustained depends on whether memory prices and AI server demand translate into higher earnings estimates.
- SK Hynix: Improving expectations for semiconductor earnings could form the second leg of a KOSPI square-root rebound. However, with expectations already elevated, any wobble in HBM and commodity memory pricing trends could dampen the stock's momentum.
- Hyundai Motor: A weaker won supports export profitability, but when foreign supply-demand (order flow) is betting on exchange-rate stability, large-cap exporters as a whole become subject to re-rating. The key variables are North American sales and incentive costs.
- KB Financial Group: Falling rates weigh on net interest margin, but as fears of a sharp economic downturn ease, concerns over loan-loss provisions and the dividend discount rate diminish. For financial stocks, credit costs matter more than the direction of interest rates in this phase.
- KOSPI large caps broadly: In rebounds following a sharp drop (plunge), liquidity tends to flow into large-cap stocks before small- and mid-caps. If foreign investors return, industry sectors with heavy index weight react first.
Risk Check
- If falling rates signal an economic slowdown, the earnings downgrade could outpace the valuation recovery.
- Foreign buying persists only while the won-dollar exchange rate stays stable. If the exchange rate rises again, the index rebound could prove short-lived.
- If semiconductor earnings forecasts turn down, the middle pillar of the KOSPI's square-root rebound weakens.
- In a phase where gains have come purely from bargain-hunting after the plunge, profit-taking pressure could intensify around earnings-season announcements.
Bottom Line
The KOSPI's initial rebound can be driven by cheap valuations and lower interest rates, but the force needed to lift the long tail of the square-root path will have to be confirmed through next season's earnings estimates, the won-dollar exchange rate, and the sustainability of foreign net buying.
This article was automatically summarized and analyzed based on the original news report. View original (Maeil Business Newspaper, Securities)
