SK Hynix Posts $78 Billion Quarter and Memory Stocks Rally

SK Hynix reported 104.62 trillion won ($78.13 billion) in third-quarter revenue on Wednesday, its first quarter above 100 trillion won in sales, and memory chip stocks rallied across two continents in response.

The South Korean chipmaker closed 10.89% higher on the day. Wall Street had expected 98.34 trillion won in revenue, according to consensus estimates cited by CNBC. The actual figure beat that by more than 6 trillion won and marked a 328% increase year over year.

Operating profit came in even stronger relative to forecasts. SK Hynix posted 83.33 trillion won ($62.22 billion) in operating profit, above the predicted 76.72 trillion won and 632% higher than a year earlier.

The company paired the results with a capital-return commitment. It announced a plan to distribute about 100 trillion won in shareholder returns this year, a sum roughly matching its quarterly revenue.

By Daniel Okafor

Why did one earnings report move the whole sector?

Memory chip stocks move together because they sell into the same shortage. SK Hynix's numbers confirmed that demand, and pricing power, remain intact after a rocky stretch.

The mechanism is straightforward. SK Hynix is a leading supplier of high-bandwidth memory used in AI data centers. When its revenue and profit clear expectations by this margin, investors read it as evidence that the AI infrastructure buildout is still soaking up supply, which lifts the pricing outlook for every memory maker.

U.S.-listed shares of SK Hynix (Nasdaq: SKHY) rose more than 7% in premarket trading on Wednesday.

The read-across was immediate in American names:

• Micron Technology (Nasdaq: MU) gained 3.97% in premarket trading.
• Sandisk Corp. (Nasdaq: SNDK) rose 4.91%.

How did Samsung and the KOSPI respond?

Samsung Electronics, SK Hynix's rival South Korean chip manufacturer, closed up 9.01%. The stock is up 101.83% year to date but down 9.87% over the past month, a pattern that mirrors its competitor's.

South Korea's KOSPI Index, where both companies trade, closed 6.63% higher. The index remains 12.73% lower for the month.

SK Hynix itself shows the same split between the long trend and the recent pullback. Its shares are up 128.42% year to date yet down 16.27% over the last 30 days.

What comes next for memory stocks?

The rally follows a rough stretch for the sector. Memory chip stocks have had a particularly bad run lately, and Wednesday may mark the beginning of a turnaround.

The backdrop explains the volatility. Memory stocks have benefited this year from a shortage driven by the buildout of AI infrastructure, but the stocks cooled after hitting record highs over the summer. SK Hynix's quarter is the first hard data point since that cooldown, and it points to demand still outrunning supply.

If Micron and Sandisk confirm that picture in their own results, the recovery has room to run. If they miss, Wednesday's rally will look like a single-company story rather than a sector turn.