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·4 min read·Will Ostuni·Weekly Market Notes

Weekly Market Notes: October 12 – October 16, 2026

The week in 10 seconds

−162.00pts−2.06%

S&P 500 futures, week open to close

Open → close7,864.75 → 7,702.75
Week range194.00 pts
Week high7,870.00
Week low7,676.00
VIX19.99+29.89%
10-year yield5.10%−2.71%

The week in three lines

  • The S&P 500 dropped 2.3% on the week, its worst performance since June, as a hot September CPI print and a tech-led selloff drove consistent selling pressure.
  • VIX surged nearly 30% to close at 19.99, signaling a meaningful shift in market risk sentiment.
  • Friday's 100-point drop in the MES was the decisive move of the week, leaving price just above the weekly low at 7676.00 heading into the weekend.

The week, bar by bar

S&P 500 futures, 4-minute closes
7,7007,800Mon Oct 12Tue Oct 13Wed Oct 14Thu Oct 15Fri Oct 16Week high 7,870.00Week low 7,676.00

Day by day

  • MonOct 12▼ −9.75−0.12%

    Quiet Monday; market drifted lower as earnings season anticipation kept volume thin.

  • TueOct 13▼ −0.75−0.01%

    Small bounce off Monday's lows; range stayed tight ahead of Wednesday CPI.

  • WedOct 14▼ −90.50−1.15%

    Hot September CPI print reignited rate fears; tech and chips led the selloff.

  • ThuOct 15▲ +27.75+0.36%

    Partial recovery as dip buyers stepped in; chipmaker losses briefly stabilized.

  • FriOct 16▼ −88.75−1.14%

    Second hard leg lower; AI and tech stocks extended losses, worst week since June.

What to watch next week

  • 7676.00 weekly low: hold or break sets the directional bias for the week.
  • Major tech earnings: AI spending guidance will determine whether the sector stabilizes.
  • 10-year Treasury yield and any Fed commentary following the hot CPI print.

Market Overview

This was a distribution week, plain and simple. The MES opened at 7885.25 Sunday evening, stalled just under 7887.00, and spent the next five sessions working lower, closing Friday at 7703.00 for a loss of 182.2 points or -2.3%. The shape of the week was a slow grind into Wednesday, a hard flush, a partial recovery Thursday, and then a second, sharper leg down Friday that tagged the weekly low at 7676.00. That is the structure of a market under real distribution, not just routine profit-taking.

The catalyst that broke the market open was Wednesday's September CPI print. Core CPI, which strips out food and energy costs, rose 2.6% against estimates of 2.5%. The S&P 500 declined 1% on the day and the Nasdaq fell 1.9%. That hotter-than-expected number revived rate anxiety and was the trigger for the week's biggest single-day drop of 63.2 points on Wednesday.

The broader selloff was led by technology. Wall Street posted its worst week since June as technology stocks tumbled amid concerns over AI spending and inflation. Chipmakers fell for an eighth straight day, the longest slide since 2008, on worries over whether the AI infrastructure buildout has outrun the ability of earnings to justify it.

The Nasdaq Composite and S&P 500 plummeted Friday and ended sharply lower for the week as AI-tied stocks sank further. Friday's 100.0 point drop in the MES was the week's decisive move, setting the tone for where the market now sits.

The 194-point range tells you volatility is back. VIX closed the week at 19.99, up nearly 30% from Monday's open of 15.39. That is a meaningful shift in the fear structure of this market.

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