Why did the cooling of CPI trigger a global selloff in risk assets? South Korea’s KOSPI surges 7%, triggering a circuit breaker

On July 14, 2026, the U.S. Bureau of Labor Statistics released the June Consumer Price Index (CPI) data. Overall CPI fell 0.4% month-on-month, far exceeding the market expectation of -0.1%, marking the first time month-on-month inflation has turned negative since May 2020. The year-on-year increase dropped sharply from 4.2% to 3.5%, below the expected 3.8%. Core CPI was unchanged month-on-month (0%), also below the expected 0.2%.

The impact of this data set lies in the fact that it came in lower than market expectations across nearly all dimensions. Just before the release, aided by hawkish remarks from Federal Reserve officials and higher oil prices driven by the U.S.-Iran conflict, market bets on a July rate hike by the Fed surged quickly from about 10% to nearly 50%. After the CPI was released, the CME FedWatch Tool showed the probability of a July rate hike plunging to 15%, while the probability of keeping rates unchanged rose to 84.5%.

A single inflation report can ignite four markets—U.S. stocks, Korean stocks, Japanese stocks, and crypto—mainly because it directly rewrote the market’s pricing of the Fed’s short-term policy path. And interest-rate expectations are precisely the anchor for how global risk assets are priced.

What are the real drivers behind the cooling of inflation?

The June CPI pullback that came in above expectations was driven most by energy prices. In June, the energy sub-index plunged 5.7% month-on-month, including a 9.7% month-on-month drop in gasoline prices. Crude oil prices fell by about 25% during the same month, directly dragging down the prices of energy commodities and related services.

But beyond energy, structural signals also deserve attention. Core CPI recorded 0% month-on-month—this is the first time since 2020 that core inflation has lost its momentum on a monthly basis. The housing sub-index recorded 0.0% month-on-month. Owner-equivalent rent slowed from 0.3% to 0.2% month-on-month. Prices for away-from-home categories fell 2.3% month-on-month, affected by fewer tourists than expected during the World Cup. The transportation sub-index fell 2.5% month-on-month, and the private transportation sub-index cooled noticeably as energy prices retreated.

However, the sustainability of the inflation cooling remains in question. China Merchants Macro Research noted that, besides the fall in energy prices, lower service prices by U.S. telecom operators, concentrated promotions by e-commerce platforms, and import normalization at low tariff levels jointly contributed to the cooling of core goods and services prices—but these factors are unlikely to continue through July. Renewed fighting between the U.S. and Iran, price increases for electronic information products, and adjustments to tariff policy could create concentrated pressure on inflation going forward. This means the current cooling of inflation may have a strong “temporary” character.

How the U.S. stock market priced CPI above expectations—the structural logic behind Nasdaq leading the gains

After the CPI data was released, all three major U.S. stock indexes closed higher. The Nasdaq rose 0.90% to 26,107.01; the S&P 500 rose 0.38% to 7,543.59; and the Dow Jones inched up 0.02% to 52,508.27.

The structural logic behind Nasdaq’s outperformance is clear: cooling inflation directly pushed down U.S. Treasury yields. The 10-year Treasury yield fell 6 basis points to 4.553%, and the 2-year Treasury yield fell 8 basis points to 4.181%. The decline in the discount rate most directly supports valuation repair for technology stocks with longer duration. The semiconductor sector became the biggest beneficiary. SK Hynix ADR surged 27.29% to $193.92, hitting an all-time high; Micron Technology rose nearly 5%; and both Nvidia and Intel rose more than 4%.

But U.S. stocks were not uniformly higher across the board. IBM plunged 25.21% after a second-quarter earnings warning, marking the worst single-day performance in its history and dragging the Dow by about 445 points. Goldman Sachs, in contrast, rose 9% on record quarterly results. The market showed clear structural divergence: cooling CPI provided a catalyst for valuation repair in growth stocks and rate-sensitive sectors, but company fundamentals remained the key variable determining the extent of gains or losses.

Why Korea’s KOSPI surged more than 7% and triggered a circuit breaker

In the Asia-Pacific session, the South Korean stock market stood out as the most eye-catching among the global rebound in risk assets. Korea’s Composite Stock Price Index (KOSPI) jumped rapidly right at the open. During the trading session, gains at one point exceeded 7%, triggering the SIDECAR mechanism at the Korea Exchange, with programmed buy orders paused for 5 minutes. KOSPI briefly touched 7,400 points intraday, with the advance nearing 7.94%.

KOSPI’s surge was not an isolated event, but the result of multiple favorable factors converging. First, SK Hynix ADR surged 27% overnight in U.S. stocks, directly transmitting to the domestic Korean market. SK Hynix’s shares in Korea rose more than 11% intraday, while Samsung Electronics rose more than 7%. SK Hynix has started large-scale production and shipment of 12-layer HBM4 memory chips for Nvidia’s next-generation “Vera Rubin” artificial intelligence platform—these are the final-spec products that have passed all quality certifications.

Second, the Korean market had built up sizable downside rebound momentum beforehand. Just the day before (July 14), KOSDAQ had only just triggered a sell-side circuit breaker. On Monday (July 13), the KOSPI index triggered a circuit breaker for the seventh time this year. From the June 19 peak to July 10, KOSPI pulled back more than 20%, yet over the same period FactSet’s consensus EPS expectations were revised upward by 3.15%—meaning the decline came more from liquidity pressure and leverage unwinds rather than deterioration in fundamentals. The improvement in liquidity expectations brought by cooling CPI provided exactly the catalyst for the oversold rebound.

In addition, policy signals at the South Korean government level were also gathering momentum. A top-level coordination mechanism covering four major economic ministries in Korea will hold a meeting on Thursday to discuss response plans to the impact of single-stock leveraged ETFs on the stock market—this topic is entering the highest-level economic coordination platform for the first time in an official manner.

The Asia-Pacific risk-on preference transmission behind the Nikkei 225 rally in tandem

Japan’s stock market rose in sync as well. The Nikkei 225 rose 1.49% and at one point was up more than 1,000 points intraday. The TOPIX index also moved higher.

The logic behind Japan’s rally differs from Korea’s. The head of the research department at Phillip Securities pointed out that U.S. June CPI fell for the first time in six years, easing market concerns about the Fed’s impending rate hikes. For Japan, falling U.S. Treasury yields imply that upward pressure on the yen may ease, and the global tech sector’s risk appetite repair directly benefits Japan’s semiconductor-related sectors—although semiconductor stocks such as Kioxia and Tokyo Electron saw some pressure during the day, the overall market was still dominated by the rebound in risk appetite.

The broad lift in Asia-Pacific risk appetite is also reflected in the MSCI Asia Pacific index, which rose overall by about 1.2%. The boost to risk assets from cooling CPI is not limited to a single market; it propagates systematically along the chain of “U.S. Treasury yields falling → the dollar weakening → valuation repair in emerging markets and Asia-Pacific risk assets.”

How the transmission mechanism extends from traditional finance to crypto assets

Crypto assets also performed prominently in this CPI-driven rebound. Bitcoin rebounded strongly from a $62,314 low before the data release, reaching as high as $65,100, setting a nearly two-week high. Ethereum performed even more strongly: it surged from a $1,774 low to a peak of $1,896, with a single-day gain of about 6%.

In terms of transmission logic, crypto assets’ reaction path to CPI data is highly consistent with traditional risk assets: cooling inflation → weaker rate-hike expectations → U.S. Treasury yields falling → dollar index softening → risk-asset valuation repair. As a high-beta risk asset, Bitcoin is extremely sensitive to marginal changes in liquidity expectations. When the market’s pricing of the “probability of a rate hike” was rapidly compressed, a squeeze-driven rally became the most direct market response.

However, the crypto market’s reaction was not one-directional. Before the CPI data was released, Bitcoin was pressured by the dual impact of geopolitical developments pushing oil prices higher and expectations for rate hikes rising. It briefly fell below the $63,000 level and approached the $60,000 integer mark. From pressure in the morning to a sharp rebound in the evening, the crypto market completed a rapid switch between bullish and bearish logic within 12 hours. This reflects that the pricing efficiency of crypto assets for macro events is improving: the market is not trading a particular project itself, but rather “which way interest rates are going, whether the dollar is getting more expensive, and whether oil prices are stable.”

The global head of digital asset research at Standard Chartered Bank said that Bitcoin has rebounded by about 11% from the $57,950 low. CPI data directly triggered the second condition in the “three ifs” framework he proposed—cooling inflation strengthened market expectations for the Fed’s July FOMC to very likely keep rates unchanged. According to historical patterns, the transmission cycle from marginal improvements in macro liquidity to Bitcoin is about 4 to 8 weeks.

How the sharp drop in the probability of rate hikes reshaped the pricing logic of risk assets

The most direct and profound change from the CPI data to the market is the reshaping of the interest-rate expectations path. Before the data was released, the probability of a July rate hike had once hovered close to 50%; after the data, it fell sharply to 15%. At the same time, the probability of a 25-basis-point rate hike in September was about 50%, while the probability of holding rates unchanged fell to 42.2%.

This repricing of interest-rate expectations has multi-layer implications for risk assets. In the short term, the removal of the risk of a July rate hike provides a tactical rebound window for risk assets. The U.S. Treasury yield curve moved lower overall—the 2-year and 10-year Treasury yields fell by 8 and 6 basis points, respectively—directly lowering the discount rate for risk assets. For assets with longer duration, such as technology stocks and crypto assets, marginal changes in the discount rate have the most significant valuation-support effect.

But from a mid-term perspective, the market still faces two uncertainties. First, whether the cooling of June CPI is sustainable. The decline in energy prices is the core driver, but geopolitical disruptions to oil prices have not disappeared. Second, Fed Chair Waller clearly stated in a congressional hearing that there is “zero tolerance” for persistent high inflation, emphasizing, “Don’t expect this to mean I’m considering rate cuts.” This means that even if the short-term probability of rate hikes declines, the Fed’s policy stance has not materially shifted toward easing.

CreditSights’ head of investment grade and macro strategy pointed out that the June CPI data basically ruled out the possibility of a July rate hike, but inflation is still elevated and the situation in the Middle East continues to deteriorate. Market pricing of the interest-rate path will still depend heavily on how subsequent economic data evolves.

From a single set of data to a trend signal—the mid-term narrative for risk assets

A CPI report can ignite four markets—U.S. stocks, Korean stocks, Japanese stocks, and crypto—within 24 hours. That in itself is a phenomenon worth reflecting on. It reveals a basic fact: the pricing anchor for global risk assets still firmly ties back to the Fed’s interest-rate path.

But a single data point cannot define a trend. The above-expectations cooling in June CPI is more the result of a retreat in energy prices and several temporary factors, rather than confirmation of a sustained downward inflation trend. After the data was released, the market quickly compressed the probability of a July rate hike from 50% to 15%—and the magnitude of this adjustment itself also indicates that, before the data was released, the market’s pricing of the rate-hike path may have been overly pessimistic.

For investors, perhaps a more valuable lens is not “what this CPI data is good for,” but rather “what kind of data environment can continuously support a re-rating of risk assets.” If future inflation data picks back up, or if geopolitical developments push energy prices higher again, the current rebound in risk appetite may only be a segment within short-term fluctuations. Conversely, if the trend of inflation cooling can continue, further downward revisions to rate expectations will provide more sustainable support for risk assets.

The one-day surge and circuit breaker trigger in Korea’s KOSPI, to some extent, is a mirror of this uncertainty— the stronger the market’s reaction to good news, the more often it also implies that the fragilities accumulated beforehand run deeper.

Summary

U.S. June CPI fell to 3.5% year-on-year and dropped 0.4% month-on-month, broadly coming in below market expectations, driving the probability of a Fed rate hike in July to fall sharply from nearly 50% to 15%. Nasdaq rose 0.9%. Korea’s KOSPI surged more than 7% and triggered a circuit breaker. Japan’s Nikkei 225 rose 1.49%, and Bitcoin broke above $64,000. Within 24 hours, the four markets completed a pricing shift from “worries about rate hikes” to “rates on hold,” validating the transmission efficiency of inflation data as the core pricing factor for global risk assets. However, the sustainability of inflation cooling remains in question. Temporary factors make up a relatively larger share beyond the retreat in energy prices, and the subsequent evolution of the data will determine whether this rebound is just short-term volatility or the start of a trend.

FAQ

Q1: What exactly was the U.S. June CPI figure?

The U.S. June overall CPI rose 3.5% year-on-year (prior value 4.2%, forecast 3.8%), and fell 0.4% month-on-month (forecast -0.1%), marking the first time since May 2020 that month-on-month inflation turned negative. Core CPI rose 2.6% year-on-year (prior value 2.9%, forecast 2.8%) and was flat month-on-month (0%).

Q2: How did the probability of a July Fed rate hike change after the CPI data was released?

Before the CPI data was released, the CME FedWatch Tool showed the probability of a July rate hike was about 40% to 50%. After the data was released, the probability of a July rate hike fell sharply to 15%, while the probability of keeping rates unchanged rose to 84.5%.

Q3: Why did Korea’s KOSPI surge and trigger a circuit breaker?

SK Hynix ADR jumped 27% overnight in U.S. stocks, directly transmitting to the domestic Korean market, lifting Samsung Electronics and SK Hynix. At the same time, the Korean market had previously accumulated significant downside rebound momentum. Improvements in liquidity expectations brought by cooling CPI provided a catalyst for the rebound. KOSPI rose more than 7% intraday and triggered the SIDECAR mechanism at the Korea Exchange.

Q4: How did Bitcoin perform after the CPI data?

Bitcoin rebounded from the $62,314 low, reaching as high as $65,100, setting a new nearly two-week high. Ethereum performed even more strongly: it surged from a $1,774 low to a peak of $1,896, with a single-day gain of about 6%.

Q5: Is this CPI cooling sustainable?

The cooling in June CPI was mainly driven by a sharp fall in energy prices, and in addition included temporary factors such as telecom operator price cuts, e-commerce promotions, and import normalization. China Merchants Macro Research noted that these factors are difficult to sustain across July. Renewed fighting between the U.S. and Iran, price increases for electronic information products, and adjustments to tariff policy could create concentrated pressure on future inflation. The sustainability of inflation cooling still needs to be validated by subsequent data.