It was a day of sharp reversals for global markets on Wednesday. South Korea's benchmark Kospi index officially entered a bear market, while oil prices shot higher after the brief US-Iran ceasefire fell apart. The moves underscore how quickly sentiment can shift when two of the market's biggest drivers—tech and geopolitics—turn volatile at the same time.
What Is a Bear Market, Exactly?
A bear market is Wall Street shorthand for a sustained decline. The term comes from the way a bear swipes downward with its paw, as opposed to a bull thrusting upward with its horns. Technically, an index enters a bear market when it falls at least 20% from a recent peak. The Kospi's 20.5% slide from its June high meets that threshold.
But context matters. The Kospi is still up more than 130% over the past year, having smashed records along the way. Much of that rally was fueled by two companies: Samsung Electronics and SK Hynix. Together, they account for roughly 64% of the index, so their fortunes dominate the broader market.
Why the Chip Giants Are Falling
Both Samsung and SK Hynix make the memory chips that tech companies have been buying in massive quantities to power the artificial intelligence build-out. That demand has been a huge tailwind for South Korean stocks. But recently, investors have grown skeptical that the AI spending spree can continue at the same pace. Some are also taking profits after the huge run-up. Since the June high, Samsung has dropped more than 20% and SK Hynix nearly 30%.
This isn't just a South Korean story. The same AI enthusiasm—and the same doubts—have been driving markets globally. For everyday investors, the Kospi's bear market is a reminder that even the hottest trends can cool off quickly. Buying the dip has been a winning strategy for much of the past six years, but bear markets can also drag on. And with expectations so high, even better-than-expected results may not be enough to lift stocks—as Samsung recently showed.
Some investors are looking elsewhere for AI exposure. Chinese internet stocks, for example, are down 25% this year, and some see them as a cheaper way to bet on the AI megatrend. Shares of Alibaba, China's answer to Amazon with its own AI ambitions, initially rose 9% on Wednesday. For more on the broader chip landscape, see our coverage of China chip stocks surging on CXMT IPO news.
Oil Jumps as US-Iran Ceasefire Collapses
While tech stocks struggled, energy markets were jolted by a sudden escalation in the Middle East. On Tuesday, Iran launched attacks on oil tankers in the Strait of Hormuz, a critical chokepoint for global oil shipments. The US retaliated with fresh strikes and reinstated sanctions on Iranian oil.
Brent crude, the international benchmark, jumped 7% on Wednesday to $79 a barrel. That's still well below April's peak of $126, but it's about 10% higher than earlier this month. The move rippled through other markets: global stocks and bonds fell as investors once again faced the threat of higher interest rates, sticky inflation, and supply chain disruptions.
For a sense of how this is affecting other currencies and commodities, see our report on the South African rand hitting a one-week low as oil surged.
What It Means for Investors
The oil price spike is a double-edged sword. For energy companies, higher prices are a windfall. With earnings season kicking off, the sector is expecting a 122% rise in profit compared to the same period last year—nearly double the tech sector's predicted 63% gain. Shell and ExxonMobil both said on Tuesday that their second-quarter profits should beat analysts' forecasts.
But for the broader market, rising oil prices are a headwind. They can push up inflation, which in turn pressures central banks to keep interest rates higher for longer. That's bad for stocks and bonds alike. The S&P 500 is still expected to post 23.3% earnings growth over last year, which would mark the seventh straight quarter of double-digit gains. Analysts see growth above 20% in the third and fourth quarters as well—but that assumes no prolonged escalation in the Middle East.
For everyday investors, the key takeaway is that diversification matters. While tech stocks have dominated headlines, energy stocks are now showing strong earnings momentum. And geopolitical risks can change the picture quickly. The oil surge also has knock-on effects for other markets, as seen in the weaker rand setting the tone for African markets.
As always, no one can predict where oil or stocks will go next. But understanding the forces at play—AI sentiment, geopolitical tensions, and earnings expectations—can help you make sense of the daily moves in your portfolio.
