Published: October 4, 2026 at 06:36 AM
Weekly Market Memory
Weekly Market Memory
1. Weekly Summary
Semiconductors single-handedly lifted the indexes. After the close on September 30, Micron reported revenue of $54.23 billion, next-quarter guidance of $61.5 billion and a gross margin of 87%, putting hard numbers behind the narrative that "AI memory demand is outrunning supply." The semiconductor ETF rose for four straight sessions from Tuesday to finish the week +3.96% at $630.60. On Friday, September nonfarm payrolls rose by just 29,000, far short of the 84,000 expected, and the probability of another hike in October fell from 64% a week earlier to 16%. With both catalysts in play, the Nasdaq closed at a record 27,190.86 on Friday, up +1.19%, and the VIX eased to 15.31. The same momentum spilled over to Korea: record September exports of $120.9 billion and memory earnings sent the KOSDAQ up +5.78% for the week, the Korea ETF gained +2.51%, and the won kept strengthening, with USD/KRW at 1,342.51 won (-1.82%).
Long-term yields refused to bend to any good news. Four catalysts that should have pulled yields lower arrived this week: a drop in WTI on Monday, consumer confidence at its lowest since 2014 on Tuesday, a slowdown in August PCE on Wednesday and a payrolls shock on Friday. Yet the 10-year rose from 5.18% to 5.28% (weekly high 5.34%) and the 30-year from 5.50% to 5.63%, ending the week near 24-year highs. That signals the driver of higher yields has shifted away from the Fed toward a term premium fed by oil, fiscal policy and global sovereign bond supply and demand. As a result, defensive and rate-sensitive sectors fell together: healthcare -2.65%, financials -2.46%, consumer staples -1.86% and REITs -1.80%. The Dow lost -1.26% and the S&P 500 -0.27%, diverging from the Nasdaq (+0.45%). Weakness in financials appeared in three regions at once, with European banks -3.7% (10/1) and the Hang Seng -2.19%. Gold futures (-3.68%) and silver (-6.65%) slumped, with gold falling -3.54% on Monday alone. The KOSPI opened the week -2.70% on its first session after the Chuseok holiday as foreign investors sold more than KRW 3 trillion of large-cap chipmakers, and ended the week -1.09%.
The FOMC minutes on October 7 (Wed) and Samsung Electronics' preliminary Q3 results on October 8 (Thu) are next week's two inflection points. Even if the Fed pauses in October, long-term yields are being held up by the term premium, so if the minutes leave strong room for a December hike, the 10-year will retest its weekly high of 5.34% and an index leaning on a single sector, semiconductors, will wobble. If Samsung Electronics beats the KRW 100-104 trillion consensus, earnings will fill the KOSPI supply-demand gap left by the end of its share buyback; if it falls short, that gap will coincide with foreign selling that has totaled KRW 30.7 trillion since August 20. Bank earnings season, starting with JPMorgan on October 13, will show whether this week's weakness in financials across three regions is confirmed as bond valuation losses.
2. Review of Last Week's Outlook
| Prior-week outlook | Actual outcome | Verdict |
|---|---|---|
| Micron earnings sustain the chip rally on top of 5% yields | Revenue of $54.23 billion and guidance of $61.5 billion far exceeded consensus. Semiconductor ETF +3.96%, stop-loss buffer 10.28% → 13.86%, Nasdaq at a record 27,190.86. Micron shares themselves fell about -2% the day after the release in a "sell the news" move | Hit |
| If the 10-year settles in the 5.2% range, weakness in utilities, REITs and financials and an exit from long bonds are confirmed | The 10-year held at or above 5.24% in all five sessions and closed at 5.28%. Financials -2.46%, REITs -1.80% and long bonds -1.92% played out as expected, but utilities rebounded +0.81% | Partial hit |
| Whether the KOSPI gaps on reopening and the won keeps strengthening | The won kept strengthening (1,342.51 won, -1.82%). But the KOSPI fell -2.70% on reopening rather than gapping up. The Korea ETF lost its entry condition on Monday and regained it on Friday, finishing the week +2.51%, which vindicated the half-size call | Partial hit |
| The copper tariff decision (9/30) sharply changes direction | The decision was not confirmed in the daily reports. Copper futures -3.13%, copper ETF -2.68%, industrial metals basket -4.01% | Inconclusive |
| Rate tantrum accelerates: 10-year at 5.5%, valuation correction in AI megacaps | The 30-year hit a new high of 5.63%, but the 10-year stopped at 5.28%, short of 5.5%. The probability of an October hike actually fell from around 70% to 16%, and AI megacaps set new highs instead of correcting | Partial hit |
| Data blackout from a government shutdown | A stopgap bill kept the government funded through December 11, and September payrolls were released as scheduled on October 2 | Miss |
| Renewed Hormuz standoff → oil rebounds → yields rise further | After President Trump rejected the reopening proposal, Brent spiked to $108.81 midweek, followed by another tanker attack and the deployment of an additional carrier strike group. For the week, however, WTI fell -1.41% ($91.11) and Brent -1.98% ($102.25). Yields rose regardless of oil | Partial hit |
| Narrowing breadth: a single stock, Micron, sets the index's direction | Nasdaq +0.45% vs Dow -1.26%, Russell 2000 -0.16%. Excluding the semiconductor ETF (+3.96%), 8 of 11 sectors fell. Semiconductors set the index's direction after Micron's results | Hit |
3. Portfolio Drift & Risk
Weekly Portfolio Drift
Equities went nowhere while bonds and gold fell together. Long bonds (-1.92%) and gold (-3.37%) declined in tandem for a second straight week, turning both traditional hedges into sources of loss. Rising yields weighed directly on long bonds, while the dollar index +0.95% (101.93) and pressure from real yields weighed on gold. The stock-bond correlation has settled in positive territory, so bonds are not cushioning equity declines. Of the four asset classes, only energy was positive, as tanker attacks in Hormuz and China's halt of refined fuel exports put a floor under oil prices.
| Asset class | Proxy ticker | Weekly return | Notes |
|---|---|---|---|
| Equities | SPY | -0.22% | Recovered most of its losses with a +0.74% gain on Friday. Concentrated in semiconductors |
| Fixed Income | TLT | -1.92% | 30-year at 5.63%. Down around 4% over two weeks; entry condition still not met |
| Gold | GLD | -3.37% | -3.94% on Monday alone. Hedge function lost to a strong dollar and rising yields |
| Energy | XLE | +1.26% | +1.95% on Thursday. Supply squeeze supports a floor under oil |
Risk Analysis
| Indicator | Value | Meaning / Context |
|---|---|---|
| VIX (Fear Index) | 15.31 (weekly high 17.59) | Within the normal range. However, the Nasdaq volatility index at 21.20 shows lingering hedging demand from concentration in tech |
| 10Y Treasury Yield | 5.28% (weekly high 5.34%) | Near its highest since 2007. The 30-year at 5.63% is a 24-year high, while the 13-week fell to 3.99%, a bear steepening |
| Max Weekly Drawdown | S&P 500 -1.64% (weekly low 7,616.78) | Deeper for the Dow at -2.47% and the KOSPI at -4.46% |
| 2-Week Cumulative S&P | +0.94% | W39 +1.21%, W40 -0.27%. Moving sideways near record highs |
| Regime | neutral | Indexes at new highs, but breadth and yields flash risk_off signals. A polarized market |
4. Sector Performance
| Sector | Ticker | Weekly return | Direction | Notes |
|---|---|---|---|---|
| Semiconductors | SMH | +3.96% | up | Top 1. Micron revenue of $54.23 billion and guidance of $61.5 billion; Nvidia's $150 billion share buyback and record highs |
| Technology | XLK | +1.80% | up | Top 2. The only one of 11 sectors to rise on the last day of Q3 (+0.64%); AI earnings offset the discount-rate burden |
| Energy | XLE | +1.26% | up | Top 3. Tanker attacks in Hormuz and China's halt of refined fuel exports drove a Thursday gain of +1.95% |
| Utilities | XLU | +0.81% | up | Rebounded +1.17% on Tuesday after six straight losing sessions |
| Industrials | XLI | -0.28% | flat | Recovered losses with a +1.77% gain over the last two days |
| Consumer Discretionary | XLY | -0.47% | flat | Monday -1.41%, Friday +1.13%. Weak Nike guidance |
| REITs | XLRE | -1.80% | down | Pressure from a 5.63% 30-year and mortgage rates above 7% |
| Consumer Staples | XLP | -1.86% | down | Defensives also hit by the discount-rate burden. Wednesday -1.53% |
| Materials | XLB | -1.89% | down | Copper -3.13%, strong dollar |
| Communication Services | XLC | -2.34% | down | Bottom 3. Monday -1.58%, Thursday -0.93%. Profit-taking in large platform stocks amid rate pressure |
| Financials | XLF | -2.46% | down | Bottom 2. Concerns over bond valuation losses spread to European banks (-3.7%) and HSBC (-5.4%). Contrary to the conventional wisdom that rising yields benefit banks |
| Healthcare | XLV | -2.65% | down | Bottom 1. -2.65% over Wednesday and Thursday. Discount-rate pressure on defensives, with small-cap biotech breaking below the lower Bollinger Band |
5. Week at a Glance
| Date | Market summary | S&P 500 | NASDAQ | VIX | WTI | Regime |
|---|---|---|---|---|---|---|
| 09-28 (Mon) | Trump's rejection of Iran's reopening proposal sent the 10-year to 5.24% and gold down -3.54%; all three major indexes fell. KOSPI reopened -2.70% | 7,683.69 | 26,820.38 | 16.07 | $92.60 | risk_off |
| 09-29 (Tue) | Consumer confidence at its lowest since 2014; despite WTI -3.48%, the 30-year rose to 5.59%. Indexes slightly lower | 7,670.84 | 26,797.54 | 16.04 | $89.38 | neutral |
| 09-30 (Wed) | Slower PCE cut October hike odds to about 37%, yet the 10-year hit a new high of 5.29%. Dow -0.86%; only the Nasdaq rebounded | 7,651.54 | 26,861.06 | 16.34 | $90.42 | neutral |
| 10-01 (Thu) | Micron results lifted semiconductors +1.45%; an oil rebound lifted energy +1.95%. European banks -3.7%, KOSDAQ +4.48% | 7,666.45 | 26,871.60 | 16.39 | $92.87 | neutral |
| 10-02 (Fri) | September payrolls shock of +29,000 cut hike odds to 16%; Nasdaq at a record. The 10-year still closed higher at 5.28% | 7,722.72 | 27,190.86 | 15.31 | $91.11 | risk_on |
| 10-03 (Sat) | Market closed — based on the prior trading day's (10-02) close | 7,722.72 | 27,190.86 | 15.31 | $91.11 | — |
| 10-04 (Sun) | Market closed — based on the prior trading day's (10-02) close | 7,722.72 | 27,190.86 | 15.31 | $91.11 | — |
6. Trading Signal Changes
Start-of-Week vs End-of-Week Signals
| ETF | Asset class | Entry condition (start) | Entry condition (end) | Change | Trail buffer (end) |
|---|---|---|---|---|---|
| SPY | Core | Met | Met | → | 29.00% |
| QQQ | Core | Met | Met | → | 29.34% |
| XLK | Core | Met | Met | → | 29.22% |
| SMH | Theme | Met | Met | → | 13.86% |
| BOTZ | Theme | Not met | Not met | → | 6.43% |
| EWY | Theme | Not met | Met | ↑ (lost 09-28, regained 10-02) | 6.87% |
| XLV | Theme | Met | Not met | ↓ (lost 10-01) | 14.46% |
| XLE | Theme | Not met | Not met | → | 15.50% |
| AIPO | Theme | Met | Met | → | 2.98% |
| ROKT | Theme | Not met | Not met | → | -3.16% |
| GLD | Safe haven | Not met | Not met | → | -7.76% |
| TLT | Safe haven | Not met | Not met | → | 3.47% |
| CPER | Commodity | Met | Met | → | 10.18% |
| DBB | Commodity | Met | Not met | ↓ (lost 10-02) | 8.19% |
Rebalancing Actions
Accumulate, in tranches
The "Micron earnings confirmation" required last week is done. Revenue and guidance both beat consensus, the entry condition held for five sessions and the stop-loss buffer widened to 13.86%. However, the post-release drop in Micron shares signals that expectations were largely priced in, so add in tranches rather than all at once.
Hold
Ample stop-loss buffer at 29.22%. Its status as the only one of 11 sectors to rise on the last day of Q3 confirmed its ability to withstand rate pressure.
Hold
Both still meet the condition, with stop-loss buffers around 29%. With semiconductors setting the index's direction, the case for raising core weight is weak.
Accumulate, half size
After losing its entry condition on Monday, the stop-loss buffer was stuck at 2.75-4.70% until a +3.10% gain on Friday restored the condition and lifted it to 6.87%. The debate verdict is also a half-size entry. With the 10/6 reopening and Samsung Electronics' 10/8 preliminary results right after entry, full size is deferred until earnings are confirmed.
Exit
Last week's Accumulate call missed. It slid -2.65% over Wednesday and Thursday and lost its entry condition on 10-01. The 14.46% stop-loss buffer is still wide, but the trend condition is gone, and the case for it as a defensive sector able to withstand rate pressure also collapsed this week.
Hold
It kept its entry condition, but the stop-loss buffer narrowed from 12.81% to 10.18%. The outcome of the tariff decision has not yet shown up in prices, so the weight stays unchanged.
Trim
Fell four straight sessions and lost its entry condition on 10-02, as a strong dollar and weak copper combined. With an 8.19% stop-loss buffer remaining, trimming is better than a full exit.
Watch
Upgraded one notch from last week's Trim. The entry condition is still not met, but the stop-loss buffer is wide at 15.50%, and fewer ships transiting Hormuz plus China's halt of refined fuel exports are deepening the supply squeeze. Enter once the entry condition is confirmed.
Watch
A +1.69% gain on Friday lifted the stop-loss buffer from 4.99% to 6.43%, out of the risk zone. The entry condition is still not met.
Watch, hold off on entry
It met the entry condition all week, but the stop-loss buffer at 1.00-2.98% is even thinner than last week. All seven debates this week were SKIP.
Stay out
The stop-loss buffer shrank from 3.85% to as low as 2.82% before ending at 3.47%. While the 30-year keeps setting 24-year highs, long bonds are not a hedge.
Stay out
The stop-loss buffer deepened from -5.06% to -7.76%.
Stay out
The stop-loss buffer stayed negative all week (-3.16% to -4.34%).
Weekly Signal Events
- New entry condition met: EWY (10-02)
- Entry condition lost: EWY (09-28, after meeting it the previous Friday), XLV (10-01), DBB (10-02)
- Entered trail risk zone (stop-loss buffer below 5%): no new tickers this week. EWY (2.75-4.70%), BOTZ (4.27-4.99%), TLT (2.82-3.85%) and AIPO (1.00-2.98%) were below 5% from the start of the week
- Exited trail risk zone: EWY (10-02, 4.25% → 6.87%), BOTZ (10-02, 4.99% → 6.43%)
- Single-stock note: MU's stop-loss buffer hit 17.45% the day after earnings and ended at 15.66%. AVGO's buffer turned negative at -0.34% on 10-01 before recovering to 1.99%
Weekly Debate Review
| Date | Ticker | Verdict | Headline | Subsequent weekly move | Review |
|---|---|---|---|---|---|
| 09-28 | EWY | REDUCE (0.5×) | The chip export supercycle and bullish moving-average alignment remain valid, but Treasury-yield-driven risk-off and an ultra-thin 4.05% trail. Enter at only 50% of normal size | +2.51% | Hit. Weathered the reopening gap-down and Wednesday's -2.31% at half size, and ended the week positive as the entry condition returned on Friday |
| 09-28~10-02 | AIPO | SKIP ×5 | Stop-loss buffer of 1.00-2.90%, below 4%; technical score 5.0, below 30. SKIP by rule, debate skipped | +0.10% | Hit. Fell as much as -2.29% midweek before ending flat, so an entry would have hovered near the stop-loss line |
| 10-03~10-04 | EWY | REDUCE (0.5×) | The chip earnings cycle and bullish alignment remain valid, but Samsung's 10/8 results and the late-October FOMC cluster right after the trail reached 6.87%. Enter at only 50% of normal size | No trading after the weekend | Inconclusive. To be tested by the 10/6 KOSPI reopening and Samsung Electronics' 10/8 results |
| 10-03~10-04 | AIPO | SKIP | Stop-loss buffer of 2.98%, below 4%; technical score 5.0, below 30. SKIP by rule, debate skipped | No trading after the weekend | Inconclusive |
Weekly Strategy Review
It was a week in which only semiconductors extended their trend while the rest lost their conditions. The Korea ETF was the only new entry, and healthcare and industrial metals dropped out, so apart from the three core ETFs and semiconductors, copper is the only ticker with both an entry condition and a stop-loss buffer. As long as long-term yields stay in the 5% range, safe-haven hedges won't work, so the right approach is to stay centered on semiconductors and core holdings while carrying the Korea ETF at half size through next week's earnings events.
7. Weekly Sentiment Trend
| Date | Reddit verdict | Key topics |
|---|---|---|
| 09-28 (Mon) | Neutral | Resigned bullishness of "it keeps going up anyway" despite Trump's rejection of the Hormuz ceasefire proposal and the 10-year above 5%; Micron earnings week |
| 09-29 (Tue) | Bearish | Nvidia's $150 billion buyback was welcomed, but a 19-year high in the 10-year, oil and quarter-end flow jitters dominated |
| 09-30 (Wed) | Bearish | Heavy losses in Anthropic's IPO filing, AI infrastructure credit risk, breadth at its weakest since the dot-com era. Repeated "dot-com bubble" and "2008" analogies |
| 10-01 (Thu) | Mixed | Focus on Micron's earnings surprise vs a 30-year in the 5.6% range, mortgage rates at 7.58% and distrust of PCE data |
| 10-02 (Fri) | Bearish | "Sell the news" debate as Micron fell despite strong results; global bond selloff and debate over a bottom in long bonds |
| 10-03 (Sat) | Bearish | Bewilderment that "the labor market is collapsing but the market keeps rising," stagflation and data distrust, WSB profit-taking posts |
| 10-04 (Sun) | Neutral | Confusion over the 2-year rising despite weak jobs data, cash moving into short-term bonds, an overheated Shiller PE and a gap with market breadth |
8. Daily Summaries
| Date | Day | One-line summary | Link |
|---|---|---|---|
| 09-28 | Mon | S&P 500 closed near a record at 7,743.41; with the 10-year near highs at 5.18%, Trump's weekend rejection of Iran's reopening proposal raised upside risk for oil | Daily report |
| 09-29 | Tue | Rejection of Iran's proposal pushed the 10-year to 5.24%, the highest since 2007; S&P -0.77%, gold futures -3.54%. KOSPI -2.70% on reopening | Daily report |
| 09-30 | Wed | Consumer confidence at its lowest since 2014; despite WTI -3.48%, the 30-year rose to 5.59% and the S&P fell -0.17%. KOSPI -0.27% on foreign net selling | Daily report |
| 10-01 | Thu | Slower August PCE cut October hike odds to about 37%, but a new 10-year high of 5.29% sent the Dow -0.86%. After the close, Micron reported revenue of $54.23 billion | Daily report |
| 10-02 | Fri | The 10-year eased to 5.24%; semiconductors +1.45% and energy +1.95% led the S&P +0.19%. KOSPI +1.95%, KOSDAQ +4.48% | Daily report |
| 10-03 | Sat | September payrolls shock of +29,000 cut October hike odds to 16%; Nasdaq at a record 27,190.86 (+1.19%), VIX 15.31 | Daily report |
| 10-04 | Sun | Market closed. Weekly wrap-up of a polarized market: Nasdaq +0.45%, S&P -0.27%, Dow -1.26%. North Korean missile launch and Hormuz tanker attack not yet priced in | Daily report |
9. Next Week's Outlook
Key Scheduled Events
- 10-05 (Mon): US September ISM services. Korean markets closed for a substitute holiday. A check on the services economy after the payrolls shock
- 10-06 (Tue): KOSPI and KOSDAQ reopen after the holiday, pricing in at once Friday's US tech rally, the Korea ETF's +3.10% gain, the stronger won and the weekend North Korean missile launch
- 10-07 (Wed): September FOMC minutes. A gauge of how strong expectations for a December hike are
- 10-08 (Thu): Samsung Electronics' preliminary Q3 results (operating profit consensus KRW 100-104 trillion, with some estimates at KRW 110 trillion); Shanghai markets reopen
- 10-09 (Fri): University of Michigan consumer sentiment. Whether slowing hiring is spreading to consumer sentiment
- 10-13 (Mon): JPMorgan's Q3 results kick off bank earnings season
Key Things to Watch
- Will long-term yields come down even if the Fed pauses?: The payrolls shock cut October hike odds to 16%, but the 10-year still closed higher at 5.28%. If the minutes leave strong room for a December hike, the 10-year will retest its weekly high of 5.34%, and weakness in financials, healthcare and REITs will extend into a third week. Conversely, if ISM services and consumer sentiment confirm a slowdown, long-term yields may respond to economic data for the first time.
- Can Samsung Electronics' earnings fill the KOSPI supply-demand gap?: Samsung Electronics' share buyback ends this week and SK Hynix's around October 15-17. If earnings come in closer to KRW 110 trillion, the memory profit cycle will be confirmed once more after Micron and the Korea ETF's entry condition will stabilize. If they stay at the low end of consensus, foreign selling and the supply-demand gap will coincide, raising the risk of the KOSPI falling back below 7,000.
- Can the semiconductor solo run last?: The semiconductor ETF is in the healthiest shape with a 13.86% stop-loss buffer, but the post-release drop in Micron shares signals that expectations were priced in. In an index that other sectors are not supporting, a single pause in semiconductors would immediately flip the S&P 500's weekly direction. Note that there is no new catalyst until TSMC's results in mid-October.
Risk Factors
- Long-term yields breaking back above 5.3% and staying there: If the minutes are hawkish or oil rises again, the 10-year will push above 5.3% and settle there. The transmission path runs from higher long-term yields → mortgage rates stuck above 7% and weakness in real estate and small caps → a further 1-3% correction in the S&P 500. The fact that all four rate-lowering catalysts this week were ignored underpins this scenario.
- Contagion across global financials: Following European banks -3.7% (10/1) and HSBC -5.4% (10/2), if US bank earnings on October 13 reveal bond valuation losses, the financial sector (this week -2.46%) will lead the decline. The Dow and European indexes, which are heavily weighted toward financials, could slide another 2-4%.
- Hormuz escalation: Another tanker was attacked on October 3, and the US is sending a third carrier strike group and 2,000 Marines. Escalation would push Brent above its weekly high of $108.81 and lift inflation expectations and long-term yields together. If negotiations resume, oil would instead fall and rate-sensitive sectors would rebound. Volatility cuts both ways.
- AI investment funding fatigue: Heavy losses in Anthropic's IPO filing, the discounted sale of Oracle data center loans and scaled-back fundraising at OpenAI have followed one another. If yields stay in the 5% range, new financing for highly leveraged data center SPVs will become difficult, and semiconductors, which are single-handedly propping up the index, along with Korean and Taiwanese chipmakers could correct 5-10% together.
This Week's Q&A
- Just last week the healthcare ETF was an 'accumulate,' and within a week its buy signal switched off. Why did defensive stocks, which are supposed to hold up when the economy weakens, fall the most this week?
- The Nasdaq is at a record, yet 8 of 12 sectors fell. With semiconductors carrying the market alone, how could things play out from here?
- Bonds and gold, which were supposed to cushion stocks when they wobble, fell together this week. So what on earth should I hold just in case?