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·4 min read·Will Ostuni·Weekly Market Notes

Weekly Market Notes: October 19 – October 23, 2026

The week in 10 seconds

−78.75pts−1.02%

S&P 500 futures, week open to close

Open → close7,739.50 → 7,660.75
Week range163.25 pts
Week high7,811.75
Week low7,648.50
VIX19.45+5.88%
10-year yield4.99%−2.00%

The week in three lines

  • The S&P 500 futures posted a three-day rally into Wednesday's high of 7811.75, then reversed sharply lower Thursday and Friday to close the week down 94 points.
  • Meta's post-earnings selloff on AI capital spending concerns was the primary catalyst for Thursday's breakdown, with Lam Research's guidance miss dragging semiconductors further.
  • The week closed near its low at 7672.25, with the VIX rising to 19.45 and the 10-year yield falling to 4.99% as investors rotated toward bonds.

The week, bar by bar

S&P 500 futures, 4-minute closes
7,6507,7007,7507,800Mon Oct 19Tue Oct 20Wed Oct 21Thu Oct 22Fri Oct 23Week high 7,811.75Week low 7,648.50

Day by day

  • MonOct 19▲ +1.00+0.01%

    Tech rebound lifted Nasdaq and S&P off prior week's lows.

  • TueOct 20▲ +11.50+0.15%

    Continued dip-buying in tech; biggest up day of the week.

  • WedOct 21▲ +49.00+0.63%

    SpaceX earnings boosted AI sentiment ahead of Meta and Tesla reports.

  • ThuOct 22▼ −97.25−1.25%

    Meta plunged ~7% on AI spending concerns; Tesla fell despite earnings beat.

  • FriOct 23▼ −43.00−0.56%

    Continued selloff; oil surge and tech pressure pushed index near week low.

What to watch next week

  • Major tech and cloud earnings: AI capex guidance will set the tone for the sector.
  • Key support at 7648.5, the week's low; a break opens downside with no clear near-term floor.
  • PCE inflation data and any Fed commentary that could shift Treasury yields from current 4.99% level.

Market Overview

The week of October 19 through October 23 printed a classic reversal shape: three days of grinding higher into resistance, then a sharp two-day flush that gave back all of those gains and then some. The S&P 500 futures (MES) opened at 7766.25 and closed at 7672.25, a loss of 94 points on the week, or about 1.2%. The week's range stretched from 7648.5 to 7811.75, a spread of 163.25 points, which reflects a market that had both genuine conviction on the way up and real panic on the way down.

The first half of the week was driven by a tech-led rebound and growing anticipation around Magnificent 7 earnings. SpaceX results Wednesday reignited AI optimism and helped push the index to its weekly high at 7811.75. That ceiling didn't last. Meta and Tesla both reported after Wednesday's close. Meta beat on revenue but flagged heavy capital expenditure commitments, which reopened the core question the market has been wrestling with all year: is AI spending translating into returns, or is it a cost spiral? Meta shares dropped close to 7% Thursday. Tesla also slid despite beating estimates. Lam Research missed guidance and dragged semiconductors further. Oil prices surged amid renewed Middle East tensions, adding pressure across the board. Thursday's reversal was abrupt, and Friday extended the damage, closing near the week's low.

The 10-year yield pulled back to 4.99% by week's end, and the VIX moved from 18.37 to 19.45, reflecting a market that repriced risk quickly once earnings gave it a reason to.

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