A Seoul Black Monday: The KOSPI Craters Nearly 9% and SK Hynix Plunges 15%. Iran Declares Hormuz Closed.

Monday, July 13, 2026, written pre-market with US futures pointing lower. The trade that looked validated on Friday looks very different this morning. SK Hynix, which popped about 13 percent on its record Nasdaq debut, was slammed in Seoul overnight, falling a record 15 percent and tripping a circuit breaker as investors sold the news the moment the listing was in the books and as domestic brokers cut their second quarter earnings estimates below consensus. The damage was not contained to one name. The Kospi crashed 8.95 percent to 6,806.93, its worst session of the year and its first close below 7,000 in two months, a genuine Black Monday for Korea, and the memory rout began bleeding into Taiwan. Sitting on top of that was the weekend headline the last note flagged as the one live wildcard: the United States carried out a fourth round of strikes on Iran on Sunday in retaliation for an Iranian attack on a Cyprus flagged container ship, Iran declared the Strait of Hormuz closed until further notice, and crude jumped about 4 percent with Brent back near 79 and WTI near 74. US futures are lower across the board, the Dow off about 0.36 percent and the Nasdaq 100 leading the decline near 0.8 percent as the chip complex takes the brunt, and prediction markets put the odds of an up open for the S&P at only about 22 percent. All of it funnels into a single 48 hour test that starts tomorrow: June CPI, new Fed Chair Kevin Warsh’s first testimony to Congress, and the bank earnings kickoff.

Top Call: The Verdict Got a Rebuttal, and Now Oil Is Making the Fed’s Job Harder Into CPI

The one thing to carry into the open is that Friday’s clean validation of the AI memory trade just got a fast and violent rebuttal, and it arrived tangled up with an oil shock that makes tomorrow’s inflation print the whole game. Two forces are hitting at once and they reinforce each other. The first is a classic buy the rumor, sell the news unwind in SK Hynix, made worse by brokers trimming Q2 numbers, which tells you the debut pop was partly positioning and arbitrage against the ADR premium rather than a fresh vote on fundamentals. The second is that Hormuz is back in play, and an oil spike is exactly the wrong input ahead of a CPI report and a brand new hawkish Fed chair. Our read is that this is a correction in an overstretched leadership group colliding with a genuine macro shock, not yet evidence the multi year buildout is broken. The scarcity story in high bandwidth memory has not changed in a weekend, but the market had priced perfection and levered it up with single stock ETFs, so an air pocket was always going to be sharp. The more important point is what oil does to rates. Crude up 4 percent with the Strait contested lifts the odds the market assigns to a Fed hike this year toward the mid 60s in percent, and it raises the risk that tomorrow’s headline CPI, already expected to firm, prints hot enough to pull the long end toward 5 percent. We would treat today as a risk management day, respect the tape, and wait for the CPI and Warsh combination before deciding whether this is a buyable dip in the AI leadership or the start of a rates driven derating.

SK Hynix and Korea: A Black Monday Undoes the Debut

Start with the reversal that defines the morning. Less than one trading day after the celebratory Nasdaq listing, SK Hynix collapsed 15 percent in Seoul to around 1,845,000 won, its worst single day on record, and the move was severe enough to trigger a circuit breaker. The Kospi fell 8.95 percent to 6,806.93, dropping below 7,000 for the first time in two months and printing a second Black Monday in as many weeks for Korean equities. The proximate causes are stacked. Arbitrage desks sold Seoul shares against the richly bid ADR, a mechanical unwind of the premium that built into the debut. On top of that, several domestic securities firms flagged that SK Hynix’s upcoming second quarter results are likely to land below consensus, puncturing the earnings optimism that had carried the name. And the macro backdrop turned hostile overnight, with the Iran driven oil spike reviving rate hike fears that hit long duration, richly valued AI names hardest. Underneath it all is the simplest explanation of all, that a rally this concentrated and this loved had become overstretched and was primed to snap on any excuse.

Our take is that the character of this drop matters more than the size. A 15 percent record fall the session after a 13 percent debut pop is the signature of positioning being flushed, not of the thesis being disproven, and the two are easy to confuse in the moment. Nothing about the structural high bandwidth memory shortage changed over a weekend, and SK Hynix’s HBM remains effectively sold out. What did change is that the market learned how much of the debut enthusiasm was arbitrage and momentum rather than durable conviction, and it got a reminder that a Q2 print now carries real downside risk after estimates crept too high. The read through for the US session is that the newly launched leveraged SK Hynix products, including the ProShares 2x fund going live today, will amplify the volatility in both directions, and that the whole memory and compute complex opens on the defensive. We stay constructive on the scarce memory layer through this, but today is a day to let the forced selling clear rather than to catch it.

Oil and Iran: The Wildcard Fired, and Hormuz Is Contested

The weekend risk the market had been watching went live. Washington conducted its fourth strike on Iran in a week on Sunday, framed as retaliation for an Iranian attack on a Cyprus flagged container ship, and Tehran responded by declaring the Strait of Hormuz closed until further notice. US Central Command publicly rejected the closure claim, but shipping through the waterway that carries roughly a fifth of the world’s seaborne oil and gas is meaningfully disrupted, and that is enough to move price. Brent climbed about 4 percent toward 79 and WTI toward 74, unwinding a good chunk of last week’s give back in a single session. The one steadying note is that both sides are still reported to be pursuing technical and peace talks even as the strikes continue, so this is escalation without a clean break in diplomacy, and the physical market remains well supplied on paper thanks to OPEC-plus barrels and record Russian exports.

Our take is that the direction of oil is clear but the second order effect is what counts, because a contested Hormuz twelve hours before a CPI print is a stagflationary tell the Fed cannot ignore. The gold move underlines it. Bullion fell about 1.4 percent to near 4,064 rather than rallying on the geopolitics, which tells you the market is treating this as a rates up, dollar up event rather than a pure safe haven bid, and that is the fingerprint of an inflation scare hitting a no cuts Fed. As long as the talks survive, the base case is that this is a spike rather than a new plateau, and a de-escalation headline could pull crude back toward the low 70s quickly. But the Strait is the unresolved knot, the closure claim keeps a fat tail alive, and until CPI clears tomorrow the market has to price the risk that oil is now actively working against disinflation.

Macro: CPI Meets a Brand New Fed Chair at the Worst Possible Moment

Here is why the next 48 hours matter more than any single overnight move. June CPI lands Tuesday, and the setup is delicate. The consensus looks for headline inflation to ease toward roughly 3.7 percent year over year, helped enormously by June’s more than 20 percent collapse in oil, while core is expected to stay sticky near the high 2s. The problem is timing. That benign oil tailwind is a June story, and the market is now staring at a July oil spike, so a soft headline print risks being read as already stale. The same morning, new Fed Chair Kevin Warsh, sworn in on May 22, delivers his first testimony to Congress, appearing before the House Financial Services Committee hours after the CPI and before the Senate the next day after PPI. The market has priced the odds of at least one Fed hike this year up toward the mid 60s in percent on the back of the oil move, with a July hold still the overwhelming base case near 75 percent.

Our take is that Warsh’s debut is now the single most important event of the week, ahead of even the CPI number itself, because the market has no read on him and he is walking to the microphone with oil spiking. A chair who leans hawkish to establish credibility against an oil driven inflation impulse could send the 30 year, already near 4.9 percent, toward 5 and put another leg of pressure on the long duration AI leadership that just cracked in Seoul. A chair who signals patience and looks through the oil noise could stabilize rates and give the memory dip a floor. Either way, the rates picture, not the SK Hynix headline, remains the master variable, and this is the morning the two finally collide. We would fade any knee jerk relief on a soft CPI headline until Warsh has actually spoken and the July oil impulse is in the data.

Sector Spotlights

AI and Semiconductors: The group is the epicenter of the selloff. SK Hynix’s record 15 percent drop in Seoul, brokers cutting its Q2 numbers, and the memory rout spreading to Taiwan have put the whole complex on the back foot, with US chip futures leading the Nasdaq 100 lower. Context matters: Nvidia is already down roughly 13 percent over the past thirty days even as TSMC has gained about 4.5 percent, so leadership within the group had been narrowing before today. The thesis has not broken, but the market is discovering how crowded and how levered the trade had become, and Thursday’s TSMC print now carries even more weight as the reality check.

Energy: Crude reclaimed a chunk of its war premium overnight, Brent near 79 and WTI near 74, on the fourth strike round and Iran’s Hormuz closure claim. Energy equities should catch a relative bid, but the more important cross asset signal is the inflation impulse the move feeds into CPI. With OPEC-plus still adding supply and the physical market long, the durability of this bounce hinges entirely on whether the Strait actually stays contested.

Financials: The banks open the real earnings season tomorrow with JPMorgan, Wells Fargo, Bank of America, Citigroup and Goldman Sachs, then Morgan Stanley and BlackRock Wednesday. With the long end near its highs and the curve steepening, net interest margin commentary and any read on credit quality will matter more than headline EPS, and this is the first broad, non AI test of whether the real economy is holding up as the memory trade wobbles.

Geopolitical Tracker

US-Iran: Re-escalating and the market’s dominant overnight driver. The United States struck Iran a fourth time in a week on Sunday in response to an Iranian attack on a Cyprus flagged container ship, and Iran declared the Strait of Hormuz closed until further notice, a claim US Central Command rejected. Shipping through the Strait is disrupted, oil jumped about 4 percent, and while both sides are reported to still be pursuing talks, the closure claim keeps a genuine supply tail open into the CPI print.

Ukraine-Russia: Structurally unresolved and, for now, the loose supply counterweight. Record Russian crude exports are one reason the global balance remains long on paper even with Hormuz contested, capping how far the oil spike can run absent a real disruption.

Taiwan Strait: Back in focus by proxy. There is no fresh military escalation, but the memory rout spreading from Seoul into Taiwanese chip names, with TSMC reporting Thursday, puts the Taiwan supply chain squarely back on the screen this week.

Quick Take: Seoul’s Black Monday Scorecard

Our Take: A record fall the day after a record debut is the market flushing positioning, not retiring the scarcity thesis. The memory layer stays ownable, but let the forced selling clear before deciding this is a dip to buy.

Quick Take: The 48-Hour Test

Our Take: Warsh outranks the CPI number this week. With oil spiking as he takes the microphone, his tone sets whether the 30 year heads toward 5 percent and pressures the AI leadership again, or whether patience puts a floor under the dip.

Notable Earnings

No scheme relevant AI, memory, storage or rocket name reports today, so the market trades the overnight tape and the setup rather than a fresh print, but the calendar turns heavy tomorrow and the names that matter to the AI complex arrive Wednesday and Thursday. The banks go first on Tuesday, and while JPMorgan, Wells Fargo, Bank of America, Citigroup and Goldman Sachs sit outside the memory and rockets scheme, they are the cleanest read on whether the real economy underneath a narrow, AI led index is actually steady, which is exactly the question a wobbling memory trade raises. The prints that speak directly to the thesis come later: ASML on Wednesday, as the sole supplier of the EUV machines SK Hynix just committed 8.6 billion dollars to buy, gives the cleanest forward read on whether the memory and logic buildout is still accelerating, and TSMC on Thursday, the foundry at the center of the AI build, delivers the single most important capex and advanced packaging data point of the week.

Our quick take is that the bar has quietly gotten higher even as the stocks have fallen, which is an uncomfortable combination. After a Seoul session that showed how fast this group can unwind on an earnings worry, ASML’s bookings and TSMC’s capex guide need to do more than confirm the narrative, they need to reassure a market that just learned how crowded it was. A strong ASML order number and a raised TSMC capex plan would give the battered memory leadership a fundamental leg to stand on and reframe today as a positioning shakeout. Any hint that the capex cycle is even flattening, landing on stocks that are still richly valued and now visibly fragile, would confirm the bears and turn a dip into a trend. This is the week the AI trade has to prove it is about shipping, not just listing.

Key Events Ahead

Monday pre-market, July 13, 2026, futures pointing lower. Friday’s validation of the AI memory trade reversed hard overnight. SK Hynix fell a record 15 percent in Seoul the session after its 13 percent Nasdaq debut, tripping a circuit breaker on ADR arbitrage selling and broker cuts to its second quarter estimates, and the Kospi crashed 8.95 percent to 6,806.93, its first close below 7,000 in two months and a Black Monday for Korea, with the memory rout spreading toward Taiwan. On top of it, the weekend geopolitical wildcard fired: the United States struck Iran a fourth time in a week on Sunday after an Iranian attack on a Cyprus flagged container ship, Iran declared the Strait of Hormuz closed until further notice in a claim US Central Command rejected, and oil jumped about 4 percent with Brent near 79 and WTI near 74. US futures are lower, the Dow off about 0.36 percent and the Nasdaq 100 down near 0.8 percent as chips lead, with prediction markets giving the S&P only about a 22 percent chance of an up open. Gold fell about 1.4 percent to near 4,064 rather than rallying, a rates up, dollar up tell, bitcoin slipped about 2.2 percent to near 62,800, the 10 year held near 4.57 percent and the market lifted its odds of a Fed hike this year toward the mid 60s in percent. Asia was mostly lower, the Nikkei off 1.9 percent to 67,243 and Shanghai down 2.1 percent, though Hong Kong edged up 0.2 percent, and Europe opened softer. It all funnels into a 48 hour test that starts tomorrow: June CPI, seen easing toward 3.7 percent on June’s oil drop even as July’s spike threatens to make it look stale, new Fed Chair Kevin Warsh’s first testimony to Congress, and the bank earnings kickoff, before ASML Wednesday and TSMC Thursday put hard numbers behind the AI capex story. For internal use only. Not investment advice.