US Stock Market Recap, Oct 13: Memory Chips Slide, S&P Flat

Wall Street ended Tuesday, October 13, 2026 almost where it started. The S&P 500 closed at 7,805 (-0.02%), the Dow at 51,670 (-0.35%) and the Nasdaq Composite at 27,204 (-0.15%). Underneath that calm surface, memory chip stocks slid for a second day after news of progress at China’s CXMT, the first big banks reported mixed results, and large health care names fell despite solid earnings. The September CPI report on Wednesday morning is the next major test.

Last verified: 2026-10-14 (based on Tuesday’s closing data, before the September CPI release)

Tuesday’s close at a glance

All three major US indexes finished flat to slightly lower on October 13. The S&P 500 lost 0.02%, the Dow dropped 0.35% and the Nasdaq Composite fell 0.15%, while the small-cap Russell 2000 slipped 0.40%. The headline moves were tiny, but individual sectors swung much more.

Here are the closing levels reported shortly after the bell. Some outlets round the Dow to -0.4% and the Nasdaq to -0.2%, which is the same data at a different precision.

How to read the table: the S&P 500 moved by less than two points from a prior close of 7,807.2, so for practical purposes it was unchanged. The weaker readings in the Dow and the Russell 2000 point to pressure on some large blue chips and on smaller companies. During the session the S&P 500 dipped about 0.26% below its prior close at the low before recovering most of that loss.

The intraday path was choppy. The S&P 500 and Nasdaq opened sharply lower, briefly turned positive, and then faded again, never quite recovering their early losses. Monday, October 12 set the tone: bond markets were closed for the holiday, the S&P 500 was roughly flat and the Nasdaq slid on chip weakness. Tuesday was effectively day two of the same story. US trading hours run 9:30 a.m. to 4:00 p.m. Eastern Time.

Why memory chips led the selloff

Memory chip stocks fell again after reports that China’s CXMT has made progress on a new memory cell design. Investors worried about fresh competition for Samsung, SK Hynix and Micron, and the news landed on a sector that was already nervous about stretched AI-era valuations.

CXMT has said it aims to introduce a new server memory product built on the new design by the end of 2026. Markets read that as a potential threat to pricing and market share for the incumbents. Concerns about whether chip stocks had run too far during the AI boom were already in the air, so the headline hit a sensitive spot.

South Korea felt it first because its market was open when the news spread. According to AP, the Kospi dropped 5.5% to 6,035.35 after sliding more than 7% intraday and briefly trading below 6,000. The index had topped 9,000 in June. Samsung Electronics fell 7.4% and SK Hynix tumbled 10.1%, while Japan’s Nikkei 225 lost 1.8%.

In the US, Kiplinger reported that SK Hynix’s US-listed shares closed down 3.2% and Micron closed down 3.6%. A memory-focused ETF, the Roundhill Memory ETF, fell about 5%. Several other chip-related stories added color on the day.

The practical takeaway is that this was a memory-led pullback, not a collapse of the whole semiconductor group. Two questions help sort it out. Is the drop a repricing for a real change in competition, or a short-term cooling after a big run? And how much of your exposure sits in memory versus equipment, design or foundry names? Charles Schwab’s strategists noted that the key for tech stocks is AI adoption and how companies hold margins as memory chip prices rise, which is why a competitive shock in memory matters beyond the chipmakers themselves.

Big bank earnings: a mixed scorecard

JPMorgan, Goldman Sachs, Wells Fargo and Citigroup all reported third-quarter results on October 13. Goldman beat revenue expectations by a wide margin and Citi beat on both profit and revenue, while JPMorgan missed on profit and revenue and Wells Fargo missed on net interest income.

Bank earnings are the unofficial start of the season, and this time the four reports pointed in different directions. The table below pairs the reported results with how shares behaved by the close.

JPMorgan shows why timing matters. Shares reportedly fell about 3% right after the report because of the revenue and trading miss, then recovered as investors focused on the stronger interest income outlook. AP’s midday story had JPMorgan up 1.2% and Goldman up 1.4%, yet closing tallies showed both slightly lower. A midday article and an end-of-day article can describe the same stock differently, and both can be accurate for their moment.

Management commentary was cautious. JPMorgan CEO Jamie Dimon pointed to large fiscal deficits, sticky inflation, elevated asset prices, rising rates and geopolitical uncertainty as forces to prepare for. The firm’s CFO said deal activity looked more delayed than canceled when asked about a pickup in the fourth quarter. Goldman CEO David Solomon described the operating environment as complicated.

For context, one market commentary noted that the KBW Nasdaq Bank Index was down 8.4% over three months while the S&P 500 gained more than 3%. Expectations for banks were already lower, which helps explain why results that looked mixed produced muted reactions. Morgan Stanley, Bank of America, BlackRock and State Street report on Wednesday.

Health care: UnitedHealth and J&J

Large health care stocks fell even on good news. UnitedHealth beat on adjusted earnings and raised its 2026 outlook, yet its shares dropped, and Johnson & Johnson raised its full-year guidance but missed on medical device sales.

UnitedHealth reported third-quarter adjusted EPS of $4.69 against a $4.06 consensus, citing lower medical costs and better execution at its Optum Health unit. It lifted its 2026 adjusted EPS outlook to at least $20.50 from $19.50 to $20.00. One market wrap reported the stock down 5.1% to $377.13, erasing roughly $18 billion in market value, and linked the move to the earnings day impact of its Medicare exit alongside the beat. Earlier in the day the shares had been indicated higher, so the direction flipped within the session.

Johnson & Johnson posted third-quarter sales of $25.4 billion, up 5.9% and above the roughly $25.28 billion consensus. Pharmaceutical sales rose 7.7% to $16.76 billion, ahead of estimates, but medical device sales rose only 2.5% to $8.64 billion and came in below expectations, with cardiovascular, orthopedics, surgery and vision all short of projections. The company raised its full-year outlook, but the device miss pulled the shares lower and drew attention to peers such as Boston Scientific, Abbott, Stryker and Medtronic.

The lesson is that a beat is not the same as a rally. Schwab’s analysis suggested this may be a quarter where beating and raising is not enough to satisfy the market. When expectations are high, a miss in one segment can outweigh a strong headline. If you own health care names, check which business line surprised in either direction rather than stopping at the top-line number.

Yields, oil, the dollar and gold

The macro backdrop on Tuesday was defined by high yields and high oil. The 10-year Treasury yield sat around 5.22%, WTI crude settled at $94.14, Brent at $105.69, and the dollar index pulled back from an 18-month high.

The table below collects closing levels from one market review. Treat them as a snapshot of where markets sit rather than precise quotes.

There was also Fed news. New York Fed President John Williams told Bloomberg that he still sees one more rate hike as appropriate this year, but does not currently think another increase will be needed in 2027. He also said there are signs inflation will slow quite a bit and approach the 2% target next year. Bonds and metals got a small lift from those remarks, and stocks trimmed their late losses. The next FOMC meeting is October 27 to 28.

Energy remains a pressure point. One market review noted US diesel futures up 2.1% to $4.82 a gallon and refiners benefiting from strong margins. Hedge fund manager Paul Tudor Jones said oil could rise another $20 to $25 in the near term, which is one investor’s view and not a forecast to rely on.

On the economic calendar, September existing home sales rose 1.5% to a 3.99 million annual pace versus 3.95 million expected. The median price hit $417,500, up 1.3% from a year earlier and a record for a September, while inventory reached 1.60 million homes, or 4.8 months of supply, the highest in units since November 2019. The NFIB small business optimism index fell 0.8 points to 97.9.

A flat index, a split market

The S&P 500 sits near record highs, but fewer stocks are participating. A narrow rally that leans on a handful of big names is a common warning sign, and several data points this week highlight it.

Charles Schwab reported that about 36% of S&P 500 stocks traded above their 50-day moving average, up from a six-month low of 20%. Over the trailing month, only 17% of index members had beaten the index as of last Wednesday, rising to 26% by Monday’s close. In other words, even with the index near a peak, most stocks have been lagging it.

Another statistic circulating among market commentators is the number of stocks with negative beta. Beta measures how strongly a stock tends to move with the index, so a negative value means it has tended to move the opposite way. Barchart noted on social media that the S&P 500 now has the highest number of negative-beta stocks on record. A separate commentator said the median stock trades 16% below its peak, the weakest breadth since the dot-com era. These are social media citations rather than official statistics, so use them as directional context.

A narrow market is not a prediction of a decline. It does mean the index depends more heavily on fewer stocks, so bad news in those names can move the whole market. On Tuesday, weakness in chips and some large health care stocks was enough to hold the S&P 500 flat, with other stocks offsetting part of the damage. Paul Tudor Jones said on CNBC that he expects to stay short for the rest of the year and called 2027 potentially very challenging for equities. That is a prominent bearish view, and optimistic views from firms such as Goldman Sachs exist alongside it.

What to watch next: CPI and earnings

The September Consumer Price Index arrives Wednesday, October 14 at 8:30 a.m. Eastern. Forecasts center on headline inflation of 3.6% to 3.7% year over year and core inflation near 2.5%.

The Bureau of Labor Statistics scheduled the release for 8:30 a.m. ET. The prior report showed CPI up 0.4% in August with energy up 2.1% on the month, and 3.4% over 12 months. Forecasts for September vary slightly by source. Headline is expected at 3.6% or 3.7% year over year and about 0.5% to 0.6% month over month, while core is seen at about 0.2% month over month. Wells Fargo economists estimated headline at 0.59% and core at 0.20%, down from 0.29% in August. Energy is driving the gap between headline and core.

What matters is the surprise relative to forecasts. Because headline inflation is widely expected to jump, the core figure is likely to shape rate expectations. The table summarizes the common market reading of the two outcomes, which are illustrative rather than certain.

Real reactions depend on positioning, other data and Fed commentary, so they can diverge from this simple map. UBS economists described the report as a signal for whether the next Fed hike is imminent or still ahead.

Beyond CPI, Morgan Stanley, Bank of America, BlackRock, State Street and chip equipment maker ASML report on Wednesday. The Fed’s Beige Book is due at 2:00 p.m. ET, and Thursday brings producer prices and retail sales. Futures were roughly flat Tuesday night, with the Dow down 0.05%, the S&P 500 down 0.02% and the Nasdaq-100 down 0.01%.

Why recap numbers differ between sites

Market recaps disagree mostly because of index definitions, timestamps and rounding. A live blog captured at 3:30 p.m. and a wrap published at 4:30 p.m. can show different signs for the same index.

This article is a good example. One recap listed the S&P 500 at -0.07%, the Dow at +0.62% and the Nasdaq Composite at -0.31%. Other wraps published after the close showed the Dow near -0.35% to -0.4%, the S&P 500 essentially flat and the Nasdaq Composite down 0.15% to 0.2%. The reason for the gap cannot be confirmed from outside, though a mix of intraday and final data is one plausible explanation. This article uses the figures that multiple post-close sources agree on.

When you cite market data in your own work, note the source, the date and the time. Some financial sites state outright that their index quotes are derived from over-the-counter or derivative instruments and meant only as a general reference. For an exact closing price, the exchange or your broker’s confirmed data is the safest source.

A checklist for tech and AI investors

After a recap like this, start with the variables that connect to what you actually own. On Tuesday those were memory chips, interest rates and earnings reactions.

This list is a general way to organize your review, not a recommendation to buy or sell anything.

• 1. Check memory exposure. See how much of your stock or ETF holdings sit in memory chips. Samsung, SK Hynix and Micron led the declines, and a memory ETF fell about 5%.
• 2. Separate the sub-sectors. Equipment, design and foundry names behaved differently from memory on Tuesday, so a single "semiconductor" label can hide big differences.
• 3. Watch rates and the dollar. With the 10-year yield above 5%, higher inflation readings can pressure growth valuations. Note the CPI time on your calendar.
• 4. Read the segment detail in earnings. UnitedHealth and J&J showed that a beat can still lead to a lower stock price when one business line disappoints.
• 5. Mind timestamps. When two articles disagree about a stock’s move, check whether one was written midday.

The reaction in Asian markets on Wednesday was not confirmed at the time this was written. Korea’s Kospi had already absorbed a large drop on Tuesday, and a second day of US chip weakness could influence sentiment, though that is only a possibility. Check live market data for the actual open.