How does a number released in the U.S. become an opening price in Seoul?
ONE-LINE ANSWER
The number does not travel directly to Korea. It passes through rates, the dollar, and U.S. equities first.
Follow the sequence from the U.S. inflation release on the night of July 14, 2026 to the Seoul open the next morning.
7.14 21:30RELEASE
DATAU.S. June CPI Released
Headline YoY 3.5% came in below the 3.8% forecast. The −0.4% MoM reading was the largest monthly decline since April 2020. Energy (−5.7%) led the decline, while core CPI YoY also eased to 2.6%.
RELEASE IMMEDIATELY AFTERBOND MARKET
RATESThe market repriced the rate path
The policy-sensitive 2-year TreasuryA U.S. Treasury security with a two-year maturity, especially sensitive to expectations for policy rates over the next one to two years. fell more than the 10-year yield.
2Y 4.191%−7bp10Y 4.575%−3bp
FedWatchMarket-implied policy-rate probabilities derived from fed-funds futures. They are not promises by the Federal Reserve.: the implied probability of holding the target range at 3.50–3.75% rose from roughly 58% to about 85%. That meant rate-hike fears receded; it did not mean a rate cut had been decided.
7.14 22:30 → 7.15 05:00U.S. SESSION
U.S. EQUITIESTech and semiconductors rebounded together
Nasdaq+0.90%S&P500+0.38%SOX+2.54%
Nvidia +4.06% · Micron +4.92% · AMD +2.57%. The direction was the same, but the size of the gains differed by stock.
7.15 05:00U.S. CLOSE
DOLLARThe dollar weakened
Dollar Index 100.7−0.6%
A weaker dollar creates room for the won to strengthen. The actual USD/KRW response must be checked separately in the next Korean session.
7.15 09:00 → 15:30KOREAN SESSION
ARRIVAL IN KOREAThe market gapped higher and held the gains into the close
Just after the open, a buy-side sidecar was triggered. The figures below are based on the Korean close and full-day cumulative flows.
Before releaseImmediately afterU.S. CLOSEKorean openKorean close
The figures above are not from the same moment. Treasury yields are from immediately after the release; Nasdaq and the dollar are U.S.-close values; the KOSPI is from the next Korean session. Mixing numbers from different timestamps can manufacture a causal story that never existed.
Same Catalyst, Different Magnitude
Nasdaq+0.90%U.S. close, early July 15 KST SOX +2.54%
KOSPI+6.24%Korean close, July 15 711 advancers · 169 decliners
Technology and semiconductor stocks also rose in the U.S., but the move in Korea was far larger. Transmission is not a copy-and-paste process. The signal is amplified and reshaped by each market’s prior drawdown, flows, and stock composition. The gap between the two indices is a clue that one U.S. data release cannot explain the magnitude of Korea’s move on its own. The prior day’s decline, a rotation in domestic flows, and stock-specific semiconductor catalysts also mattered.
The transmission path is now visible. Now it is time to read the number at the starting point properly.
02THE READING FRAMEWORK
A Number Is Not One Thing: Read It in Four Layers
Four layers overlap when you read the same indicator. Isolate just one, and you can misread the direction.
LAYER 01Actual vs. Forecast
What matters first is how far the release deviated from expectations.
LAYER 02Prior Reading & Revisions
If the previous reading was heavily revisedPreviously released statistics that are later updated using more complete data. Revisions are especially common in employment reports., the economic picture can change.
LAYER 03Headline vs. Core
If headline inflation is low while core remains high, volatile categories such as food and energy may be what pulled down the overall number.
LAYER 04MoM vs. YoY
MoM captures the latest pace; YoY captures the cumulative change over a year. A decline in the price level is different from a slowdown in the inflation rate.
U.S. Consumer Price Index · June 2026Released 2026.07.14 · Actual and prior: U.S. Bureau of Labor Statistics · Forecast: market consensus
All four actual readings came in below forecast. Energy pulled headline MoM lower, but core YoY also eased from 2.9% to 2.6%. The interpretation would have been different if only the headline measure had fallen. MoM is seasonally adjusted; YoY is unadjusted.
Consensus Is Not a Single Number
Headline YoY forecast3.8%·3.9%
Different surveys produced different forecasts for the same release. The baseline changes with the survey provider, timing, and whether the mean or median is used. Consensus is not the answer; it is the baseline from which the market starts.
The Transmission Path Splits
The same release does not always end at the same destination. The fork begins with one question: why did rates fall?
Inflation came in below expectations
THE PATH SPLITS HERE
PATH A Rate pressure eases
Tightening fears recede · Rates fallWeaker dollar · room for a stronger wonGrowth-stock valuations recoverForeign flows improve
PATH B Growth fears dominate
Growth-slowdown fears · Rates fallEarnings forecasts fall · equities declineRisk-off move · dollar may strengthenForeign flows deteriorate
Rates fall in both paths. That is why a decline in rates is neither inherently bullish nor bearish. The arrows show common transmission paths, not an automatic formula.
A Falling U.S. 10-Year Yield Is a Question, Not a Bullish Signal. Start with why it fell.
What Happens at Each Transfer Station
What each station does—and the misreading that most often happens there.
U.S. 10-Year Treasury · FedWatch
The yield the market demands to lend to the U.S. government for 10 years. When it rises, the discount rateThe rate used to convert future earnings into present value. The higher it is, the less distant future profits are worth today. rises, putting pressure on long-duration growth stocks first.
It is not the Fed’s rate schedule. Growth expectations and Treasury supply-demand also move yields. FedWatch is likewise derived from futures prices, not a promise from the Fed. “Rate-hike fears receding” and “rate-cut expectations returning” are not the same statement.
Dollar Index & USD/KRW
The Dollar Index measures the dollar against a basket of major currencies. USD/KRW is the direct exchange rate between the dollar and the won.
Even when the Dollar Index falls, USD/KRW does not necessarily decline by the same proportion. Trade flows, foreign-investor activity, the yuan, and Bank of Korea policy all matter. The Dollar Index gives the broad direction; USD/KRW adds Korea-specific conditions to that price.
SOX & VIX
SOX tracks major U.S.-listed semiconductor companies. VIX measures short-term volatility expectations embedded in S&P 500 options.
A rise in SOX does not mean every Korean semiconductor stock will rise. Even within the index, GPU, memory, and equipment names can move by different amounts, while Korean memory stocks have their own flows and catalysts. VIX is closer to a gauge of the price of insurance than a directional forecasting tool.
Once you understand the path, one final question remains. Why can the same number produce different outcomes?
03CONDITIONS & INTERPRETATION
The Same Number Can Produce a Different Market Answer
Markets price inflation and growth together. Cross those two axes and the market falls into four different “weather” regimes.
Inflation easing · Growth resilientPotential GoldilocksIf tightening pressure eases and rates and the dollar stabilize, growth stocks have room to recover.
Inflation rising · Growth resilientRate pressure may dominateHigher rates last longer. High-P/E growth stocks feel the pressure first.
Inflation easing · Growth slumpingGrowth fears may dominateRates fall, but earnings expectations fall too. Recession fears may matter more.
Inflation rising · Growth slumpingStagflation riskRate pressure and earnings concerns hit at the same time. Sector dispersion widens depending on the cause.
All four cells are possibilities. Do not label a release bullish or bearish from its name alone. The next test is how rates and equities actually reacted.
When You Read a Macro-Data Headline, Use This Order
1
Read actual, forecast, and prior together
2
Separate headline from core, and MoM from YoY
3
Check revisions and underlying components
For inflation: shelter, services, and energy. For jobs: revisions and wages.
4
Check the response in yields and FedWatch
Also note whether the 2-year and 10-year moved differently.
5
Check the Dollar Index and USD/KRW
Do not mix the timestamps of the two series.
6
Check Nasdaq, SOX, and VIX
Look at differences between individual stocks, not just the indices.
7
Verify it in the next Korean session
The final test is whether the move carries through to foreign futures/cash flows and the major Korean semiconductor stocks.
A hold can be read as hawkish, and even a hike can be read as dovish. Prices respond not just to the decision, but to how the Fed describes the path ahead.
* The dot plot and economic projections are released only at designated meetings.
Can we conclude that Korean semiconductor stocks will rise the next day?
CHECK THE READING
FAVORABLE STARTING CONDITIONS · NOT CONFIRMED
Inflation below forecast, lower yields, a weaker dollar, a higher semiconductor index, and room for won strength: all five conditions are favorable. Even so, check the following.
·Whether SOX gains extended to memory and equipment names·Stock-specific news for Samsung Electronics and SK hynix·Foreign futures and cash-equity flows in Korea·Whether buying continues after the opening gap·Whether USD/KRW remains stable during the Korean session·The prior day’s decline and how much was already priced in
You can say a favorable transmission path formed in the U.S. But you cannot call the next-day rise confirmed until foreign flows and the major semiconductor stocks validate it in Korea.
Easy-to-Misread Statements
TRAP 01“CPI came in low, so a rate cut is now certain.”
One data release cannot determine a Fed decision. Employment, growth, and Fed communication can change the path again. “Rate-hike fears receding” and “rate-cut expectations returning” are not the same statement.
TRAP 02“The U.S. 10-year yield fell, so it is automatically bullish for growth stocks.”
If yields fell because inflation stabilized, that may be supportive. If they fell because recession fears intensified, equities may fall as well. Start with why the yield fell.
TRAP 03“SOX rose, so Samsung Electronics and SK hynix will rise too.”
GPU, memory, and equipment stocks can diverge even within the same index. Check flows and news for Korean memory stocks separately.
NEXT
But even when rates and the dollar stabilize, why can the stock of a good company still fall? What did the market price in first?
EPISODE 4 Why a Good Company Is Not Always a Good Stock
One-Line Glossary
CPI
Consumer Price Index. Measures changes in the prices households pay for goods and services.
Headline CPI
Overall consumer inflation including food and energy.
Core CPI
Consumer inflation excluding volatile food and energy, used to gauge the underlying trend.
MoM
Month over month. Measures change from the previous month and captures the latest pace.
YoY
Year over year. Measures change from a year earlier and captures the cumulative result.
Seasonal adjustment
A statistical adjustment that removes recurring seasonal effects. MoM data are usually presented on this basis.
Consensus
A representative market forecast compiled from multiple institutions; the figure can vary by provider.
Surprise
The difference between the actual release and the forecast.
Revision
A previously released statistic that is later updated and republished.
FOMC
Federal Open Market Committee, the Fed body that sets the policy rate.
Dot plot
A chart plotting the policy-rate levels individual FOMC participants judge appropriate in future periods.
FedWatch
A table of market-implied policy-rate probabilities calculated from fed-funds futures prices.
U.S. 2-Year Treasury
A two-year Treasury security, highly sensitive to expectations for near-term policy rates.
U.S. 10Y
A 10-year Treasury security reflecting growth, inflation, and rate risks.
The dollar’s broad value against a basket of major currencies.
SOX
The Philadelphia Semiconductor Index, which tracks major U.S.-listed semiconductor companies.
VIX
Short-term volatility expectations implied by S&P 500 options.
discount rate
The rate used to convert future earnings into present value.
Risk appetite
The market’s willingness to buy risk assets.
Priced in
A condition in which an expected development is already reflected in price before the announcement.
Actual Cases Used in This Episode
2026.07.14 · U.S. June CPI · Headline CPI: −0.4% MoM (seasonally adjusted), 3.5% YoY. Core CPI: 0.0% MoM, 2.6% YoY. The monthly decline was the largest since April 2020. Energy −5.7%, gasoline −9.7%. Crude oil had fallen about 21% after the Strait of Hormuz reopened, to around $77 per barrel.
2026.07.14 · Immediately After the Release Through the U.S. Session · U.S. 2Y 4.191% (about −7bp), 10Y 4.575% (about −3bp). Dollar Index 100.7 (−0.6%). S&P 500 +0.38% (7,543.89), Nasdaq +0.90% (26,107.01), SOX +2.54% (12,661.93). Nvidia +4.06%, Micron +4.92%, AMD +2.57%, Broadcom +1.32%.
2026.07.14 FedWatch · The implied probability of holding the target range at 3.50–3.75% rose from about 58% the prior day to about 85% after the release. The figure varies with the snapshot time.
2026.07.15 · Korean Session · KOSPI 7,284.41 (+6.24%), KOSPI 200 +6.56%, KOSDAQ +5.80%. Foreign KOSPI cash equities +₩2.32tn, retail −₩2.47tn, institutions +₩0.18tn. KOSPI: 711 advancers, 169 decliners. A buy-side sidecar was triggered just after the open.
Do not explain that day’s rally with the inflation report alone. The U.S. and Korea moved in the same direction, but the magnitude and breadth differed. The preceding drawdown, a rotation in domestic flows, and stock-specific semiconductor catalysts amplified Korea’s response.
Sources & Data Notes
Actual and prior readings: U.S. Bureau of Labor Statistics (BLS), June 2026 CPI release, July 14, 2026 at 08:30 ET (21:30 KST). The prior reading is based on the May release published June 10, 2026.
Forecasts: BLS does not publish forecasts. The forecast column uses reported market-consensus estimates and varies by survey provider. Some reports used 3.8% for headline YoY, while others used 3.9% based on FactSet consensus.
U.S. rates, dollar, and equities: reported values for the July 14, 2026 U.S. session. Treasury yields are same-day post-release values; Nasdaq, S&P 500, SOX, and the Dollar Index are U.S.-close values (early July 15 KST).
SOX return: Nasdaq official index history, July 14, 2026 close of 12,661.93 (+2.54%).
FedWatch probabilities: CME FedWatch, based on reported figures around the July 14, 2026 release. Because values vary with snapshot time, the report uses approximately 58% → approximately 85%.
Individual semiconductor-stock returns: reported values for the July 14, 2026 U.S. session. Do not confuse these with figures from the July 15 U.S. session. The U.S. session preceding Korea’s July 15 session was July 14.
Korean indices, flows, and sidecar: Korea Exchange (KRX), July 15, 2026. Trillion-won figures are rounded.
The figures in the practice problem are hypothetical values created for explanation, not actual market data.
Items not quantified in the body because they could not be verified: that day’s VIX close and percentage move, offshore USD/KRW, and the next day’s Seoul FX close. These are discussed only as concepts and checkpoints. Unverified figures are not filled in.
This material is educational content intended to explain economic and stock-market terminology and market structure. It is not a recommendation to buy or sell any financial product.
The Language of Markets · Episode 3 How U.S. Data Reaches Korea