U.S. inflation data came in significantly softer than anticipated, driving a broad rally on Wall Street and lifting Asia-Pacific markets higher on Wednesday. South Korean stocks led the gains, with memory chip shares staging a strong rebound.
During the Asia-Pacific session on Wednesday, the KOSPI index surged over 7% at the open, leading regional markets. The MSCI Asia Pacific Index rose 1.2%, while Japan's TOPIX gained about 1% and the Nikkei 225 climbed approximately 1.49%.
Shares of Samsung Electronics rose more than 7%, and SK hynix jumped over 10% in Seoul trading, following a 27% surge in its U.S.-listed ADRs the previous day.
Due to a 5% rise in KOSPI 200 index futures, the Korea Exchange activated a sidecar mechanism, temporarily halting program buying for the KOSPI.
The strong rebound in South Korean equities benefited significantly from a recovery in the U.S. memory chip sector the prior day.
On Tuesday, U.S. AI semiconductor stocks rose 3.19%, AI software infrastructure gained 3.24%, optical communications climbed 2.92%, and agentic AI advanced 2.93%. Among individual stocks, Micron Technology closed nearly 5% higher, while Nvidia and Intel both gained over 4%.
Key Market Driver: June CPI Data
The June U.S. CPI report served as the core driver for the day's market movements.
U.S. inflation cooled across the board. June CPI rose 3.5% year-over-year, well below expectations, and fell month-over-month for the first time in six years. Core CPI growth slowed to 2.6%, quickly easing market fears of imminent interest rate hikes.
A senior portfolio manager stated that the data was a comprehensive downside surprise, effectively taking near-term rate hikes off the table. The report, which the market had been highly vigilant about, is supportive for bond markets and will likely lead to a re-steepening of the yield curve. He noted that their baseline forecast of the Federal Reserve holding steady is confirmed by this data.
An investment strategist pointed out that the lower-than-expected CPI data is a relief. While it won't completely eliminate discussions about further policy tightening, it should effectively rule out a July rate hike and supports her expectation that the Fed will hold steady at least until 2026.
However, despite the receding hike expectations, market pricing for at least one rate hike this year has not been fully eliminated, with the probability of a second hike seen as roughly even. Another analyst cautioned that today's data provides a breather, not an all-clear signal, noting that while inflation has cooled, it has not disappeared.
Geopolitical Tensions and Oil Prices
Despite improved risk sentiment from cooling inflation, crude oil market movements remained dominated by geopolitics.
The U.S. announced the reinstatement of a naval blockade on vessels transiting Iranian ports and coastal areas and launched a new round of strikes against Iran. WTI crude rose about 1% in early Asian trading to around $80 per barrel.
Simultaneously, U.S. and European refined product markets are showing historic tightness. Escalating tensions in the Middle East are fueling concerns over fuel supply, with high oil prices continuing to pressure consumers.
An analyst noted that Brent crude around $85 per barrel is still manageable; the real story is in refined products. Distillates, not crude, are the true inflation signal. Heating oil futures have hit new highs since the conflict began, highlighting the tightness in product markets. Any further disruptions would disproportionately impact inflation.
He also cautioned that asymmetric warfare does not require an actual blockade of the Strait; merely suppressing shipping volumes is enough to push energy prices higher, particularly for larger, more expensive, and more explosive LNG carriers.
The U.S. Dollar Index edged down 0.09% during the Asia-Pacific session.
Spot gold extended its gains, rising slightly by 0.12% to $4,058.
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