Why Is Oil Down Today? WTI Breaks Below $100 on Iran Talks as ISM Beats and Stocks Bounce

The Short Version

• Oil is down about 7%, with WTI near $96.80, as Iran floated a plan to reopen the Strait of Hormuz. Stocks are bouncing after a rough Friday.
• ISM Manufacturing came in at 55.5, above the roughly 54.6 to 54.7 consensus, with production at its highest since November 2021.
• This week packs ISM, Apple, Palantir, the midterms, AMD, and the October jobs report into five sessions.
• Options price roughly a 1.7% move in SPY by Friday. If the data cooperates, the bounce has room. If it doesn't, Friday's lows are the line to watch.

Where Things Stand (About 8:33 AM PT)

How We Got Here: Friday and October

Friday, October 30 was ugly. The S&P 500 fell 1.82% to 7,580.07, which per @bespokeinvest left it one penny above its May close. The Nasdaq Composite dropped 2.85% to 25,437.00, the Russell 2000 closed at 2,811.84, and semiconductors took the worst of it, with SMH down 6.98%.

For the month, the Nasdaq 100 lost about 6.5%, its worst month since March 2025. The VIX closed at 19.42 with VIX3M at 20.78, so the volatility curve is still upward sloping. That suggests worry, not panic.

Under the surface the picture was healthier than the headline indexes. Per @bespokeinvest, the equal-weight S&P had its best month relative to cap-weight since April 2009. Eight of 11 sectors sit above their 50-day moving averages, while tech sits about 5.4% below its own. In plain terms: October was a tech selloff, not a market-wide breakdown.

One thing worth watching: credit. Per @CheddarFlow, Broadcom's 5-year credit default swaps hit a record 175.4bp, and Intel's CDS also set a record. When credit markets get nervous about big chip names, it tells you the AI spending debate has moved past stock prices and into funding costs.

The Oil Story: Why Sub-$100 Matters

Iran's foreign minister floated a two-day plan to reopen the Strait of Hormuz if the US meets certain conditions. Talks in Doha are in day three, and Secretary Rubio says President Trump prefers diplomacy. Oil responded fast, and the selling picked up after the open, taking WTI from about $99.60 premarket to near $96.80.

Not everyone is calling the top. Goldman raised its December Brent forecast to $105, which is close to where Brent trades now. That's a reminder that a deal headline and actual barrels moving are two different things.

If/then:

• If talks produce a concrete Hormuz timeline, then energy prices could keep easing, which helps inflation expectations and gives rate-sensitive stocks some air.
• If talks stall, then the oil drop could reverse quickly, and with the 10-year near 4.93%, that combination would be hard on growth stocks.

The Fed: What Polymarket Is Pricing

As of 5:22 AM PT on Polymarket:

• December Fed meeting: 70.5% on a 25bp hike, 27.5% on a hold.
• October nonfarm payrolls: median expectation around 65k to 70k, with 28.5% on 100k or more.
• Unemployment at 4.2%: 44%.

A hike being the favored outcome is the backdrop for everything this week. Strong data could firm up those odds. Soft data could cut into them.

ISM Manufacturing: A Beat With Sticky Prices

The 7:00 AM PT ISM Manufacturing PMI came in at 55.5, up from 54.5 in September and above the roughly 54.6 to 54.7 consensus. Production jumped to 59.0, its highest since November 2021, and new orders edged up to 55.5. The prices index eased to 75.2 from 77.9 but is still high, and employment slipped to 52.4.

In plain terms: factories are busy, and input costs are cooling only a little. That is the kind of print that supports the hike case, but falling oil and a lower 10-year yield are offsetting it for now.

Big Movers

Marvell (MRVL) and Lumentum (LITE): Marvell agreed to buy Lumentum in an all-stock deal with an implied enterprise value of about $115 billion, at 4.5 MRVL shares per LITE share. Closing is targeted for the first half of 2028. Both stocks are lower: MRVL is down about 6.7% near $183, and LITE is down about 12.5% near $736. At 4.5 MRVL shares, the implied value is about $825 per LITE share, so LITE trades roughly 11% below it. That gap shows the market sees real risk in a deal timeline that long.

Oracle (ORCL): Oracle filed for a $10 billion stock sale alongside a $10 billion bond sale, about $20 billion total per Fitch. Shares were down about 3% premarket and the selling deepened after the open, with ORCL down about 5.3% near $123.70. Selling stock to fund AI buildout dilutes current holders, and it links straight back to the credit concerns above.

The Week Ahead (All Times PT)

Monday, Nov 2

• 7:00 AM: ISM Manufacturing came in at 55.5 (beat)
• 8:15 AM: Fed's Goolsbee speaks
• After close: Apple (AAPL), Palantir (PLTR) earnings

Tuesday, Nov 3

• Midterm elections
• 7:00 AM: JOLTS job openings
• After close: AMD earnings

Wednesday, Nov 4

• 5:15 AM: ADP employment
• 7:00 AM: ISM Services

Thursday, Nov 5

• 5:30 AM: Weekly jobless claims

Friday, Nov 6

• 5:30 AM: October jobs report (consensus 65k, unemployment 4.2%)

On the midterms, Polymarket shows Democrats at 94.5% to win the House and 72.5% for the Senate. A lot of that looks priced in, so a surprise in either direction would matter more than the expected result.

What to Watch: If/Then Scenarios

• ISM Manufacturing beat at 55.5. That supports the hike case on paper, but yields are slightly lower so far because oil is falling hard. If yields start climbing into the afternoon, tech could lose its bounce.
• If Apple and Palantir hold up after the close, then the Nasdaq has a chance to stabilize after its worst month since March 2025.
• If AMD guides cautiously Tuesday, then the semiconductor selloff and the credit stress at Broadcom and Intel become the main story again.
• If Friday's jobs number lands near 100k or above, then the December hike case strengthens. If it comes in well under consensus, the rate debate shifts.
• If oil stays below $100 all week, then it's one less pressure on inflation and on the Fed.

SPY options imply about a 1.68% move in either direction through Friday. With this many catalysts, that's a reasonable range, not a ceiling.

The Bottom Line

The morning bounce held through ISM, which is a start, not a verdict. October was a tech problem more than a market problem, and oil is offering some relief. But between a Fed priced to hike, credit stress in chips, and a calendar packed with earnings, politics, and jobs data, this week will likely set the tone for the rest of the fall. Know your levels and let the data lead.

This recap is for informational and educational purposes only and is not investment advice. Markets carry risk, and nothing here guarantees any outcome. Prices as of about 8:33 AM PT (delayed public quotes); Polymarket odds as of 5:22 AM PT. Subject to change.