South Korea's benchmark stock index has scaled a new peak, reaching above 6,000 points just one month after surpassing the once-unimaginable 5,000-point psychological barrier. The rally is driven by a surge in global memory demand, providing strong momentum for the country's largest chipmakers.

On Wednesday, the Korea Composite Stock Price Index (KOSPI) climbed steadily, rising 1.83% to a record high of 6,079 points. Shares of Samsung Electronics increased by 2.5%, while SK Hynix saw a 1.4% gain before both pared some of their advances. So far this year, the benchmark index has surged 42%, building on a 76% jump recorded last year.

Long viewed as undervalued by foreign investors, South Korean equities have now emerged as clear winners in global markets. The so-called "AI panic trade" has worked in the country's favor, as software plays a minor role locally while hardware manufacturers continue to drive the market upward. Corporate governance reforms have also contributed to the uptrend, with parliament expected to pass a bill later on Wednesday requiring companies to cancel treasury shares.

The latest gains in South Korean stocks are part of a broader global tech rally, fueled in part by Meta Platforms' agreement with AMD to purchase chips and computers for running AI models. "Korea continues to benefit from multiple structural tailwinds, and the positive spillover effects from the memory super-cycle are increasingly spreading across the broader tech ecosystem," said Homin Lee, senior macro strategist at Lombard Odier. "Even if the path beyond 6,000 proves bumpier, we still see meaningful upside potential for the index over the next 12 months."

A recent U.S. Supreme Court ruling overturning former President Trump's reciprocal tariffs has also been seen as a tailwind. Tiffany Hsiao, an investment manager at Mathews Asia, expects "Korean exporters linked to U.S. consumer demand, especially in electronics and components, to benefit from reduced tariff uncertainty."

There are early signs that Korean retail investors, who have traditionally favored U.S. stocks over domestic ones, are returning. If this shift continues, it could fuel the next leg of the rally. Despite having a much smaller economy, South Korea's total stock market capitalization has already surpassed that of Germany and is on par with France.

Although such rapid gains often raise alarms, analysts remain optimistic, calling it a watershed moment for South Korea. Nomura recently raised its mid-year target for the KOSPI to as high as 8,000 points, citing strong earnings from the memory super-cycle, AI capital expenditure chains, and the defense sector, along with valuation reassessments in the physical AI supply chain.

"If Korea can accelerate corporate value reforms and structural improvements to the KOSDAQ, we expect further revaluation beyond 8,000," wrote Nomura analysts Cindy Park and Dongmin Lee in a report. "The path to KOSPI 8,000 depends on Korea's ability to achieve commercial law reforms and avoid backtracking on shareholder rights."