Chip surge pushes Nikkei, Kospi higher; Japan's rally reasoning questioned

The Kospi's advance appears to be a consistent, semiconductor-driven narrative: dollar sales by exporters bolstering the won, foreign capital entering equity markets, and a genuine global AI demand catalyst reflected in the gains of Samsung and SK Hynix. A more intriguing development is in South Korean bonds, where the three-year and ten-year yields both edged down a little, even as global bonds face renewed upward pressure, according to recent remarks by Mohamed El-Erian about a wider sovereign sell-off. This is a real divergence to monitor: if Korean yields keep breaking away from the global bond weakness El-Erian outlined, it suggests that domestic demand for Korean debt is holding up even as the pool of consistent buyers for US and European government bonds reportedly shrinks. Japan's upturn presents a different situation. The explanation given – that a quieter bond market and a more stable yen, resulting from Treasury Secretary Bessent's moves, reduced volatility – does not match well with the reported facts in the same article: Wall Street declined on Friday as rising odds of a Fed hike weighed, with only the semiconductor sub-index resisting the drop. Attributing a broad risk-on move to bond and currency stability, while the source material indicates the opposite in US rates and a narrow, chip-focused rally rather than a broad market advance, is a discrepancy worth noting rather than passing along without question.

The rally in South Korean chips and currency has a straightforward explanation; Japan's stated reasoning for its own rally is more difficult to reconcile with the actual events on Wall Street.

In summary:

• The Kospi in South Korea climbed approximately 2.9% to around 6,880, after surging as much as about 3.5% intraday to its highest point since August 27.
• Samsung Electronics advanced roughly 3.7% and SK Hynix gained about 6%, driving the index higher on optimism over AI chip demand.
• The Korean won strengthened to its strongest since October 2024, with foreign investors being net buyers of about 790 billion won, or approximately $590 million, in equities.
• South Korea's three-year and ten-year government bond yields both edged down slightly, a marked contrast to the upward pressure on global bond yields reported elsewhere this week.
• Japan's Nikkei rose about 2.3% to roughly 66,500, with the stated reason being that calmer bond markets and a more stable yen reduced overall market volatility.
• Wall Street actually fell on Friday as a strong jobs report increased the probability of a Fed rate hike, with only the semiconductor index avoiding the decline, a fact that complicates the narrative for Japan's rally.

South Korean equities and the won rose at the start of the week, fueled by semiconductor companies benefiting from optimism about AI investment, while Japan's Nikkei also gained, but its explanation warrants more careful examination. The Kospi increased by about 2.9% to approximately 6,880, after rising as much as 3.5% during the session to its highest since August 27, with Samsung Electronics rising about 3.7% and SK Hynix climbing about 6% to top the index.

The Korean won reached its strongest since October 2024 on expectations of ongoing dollar selling by key exporters, while foreign investors were net buyers of about 790 billion won, or $590 million, of shares. South Korea's exports this year have already exceeded last year's full-year record, highlighting how much the economy depends on global AI chip demand.

A more interesting element is in South Korean bonds. The three-year and ten-year government bond yields both edged down slightly on the day, a real contrast to the broader global bond situation described by economist Mohamed El-Erian in recent comments to CNBC, in which he cautioned about ongoing upward pressure on yields due to a decreasing number of dependable buyers for government debt globally, although El-Erian did not specifically address Korea. If this divergence persists, it indicates that Korean bonds are currently being influenced more by domestic demand factors than by the buyer-base worries El-Erian highlighted for markets such as the UK, Japan, and France.

Japan's Nikkei advanced about 2.3% to approximately 66,500, while the Topix gained about 0.8% to around 4,136, as chip-related stocks followed their US peers higher. A narrative in circulation, that US Treasury Secretary Scott Bessent's moves had lowered bond yields and stopped yen weakness, thus reducing volatility and prompting a move toward risk-on positioning, should be viewed with some caution. The same reporting points out that Wall Street actually declined on Friday, as a strong US jobs report increased the likelihood of a Federal Reserve rate hike this month, with only the Philadelphia Semiconductor Index, rising about 3.4%, resisting the drop. A limited, chip-focused rally set against broader US equity weakness and rising rate expectations is a different picture from the calmer, risk-on story presented for Japan's gains, and the inconsistency is worth remembering before accepting the given explanation as is.