---
title: "Alphabet’s worst day and Amazon’s cash outflow put AI spending on trial."
url: https://causamarkets.com/edition/2026-10-30/
publisher: Causa
edition: 7
published: 2026-10-30T06:00:00Z
updated: 2026-10-30T11:30:00Z
license: CC BY 4.0
---

# Alphabet’s worst day and Amazon’s cash outflow put AI spending on trial.

Causa, Edition 007. Friday 30 October 2026. Before the US open, 06:00 GMT, with Thursday’s closes.

Alphabet fell 12.6% and pulled the Nasdaq down 1.4% even as most S&P 500 stocks rose. After the close, Amazon reported its fastest AWS growth in nearly five years but a $42.4 billion free cash outflow over twelve months, and its shares fell about 6%.

## What moved markets on Thursday 29 October 2026, and why

The Nasdaq Composite fell 1.38% to 26,184.72 on Thursday as Alphabet dropped 12.64%. The S&P 500 slipped 0.30% to 7,720.39 and the Dow 0.25% to 52,342.56, but the Russell 2000 rose 1.01% and about 80% of S&P 500 members closed higher. (Sources: [Capp Notes](https://cappnotes.substack.com/p/closing-look-thursday-october-29), [TradingKey](https://www.tradingkey.com/analysis/stocks/us-stocks/262258198-us-pce-inflation-3-6-percent-alphabet-plunge-12-6-percent-nasdaq-amazon-intel-weak-tradingkey))

After the close, Amazon reported 39% growth at AWS and a free cash outflow of $42.4 billion over the past twelve months, after spending $77.3 billion on property and equipment in the quarter. Its shares fell about 6% after hours, and Intel fell about 17% on weak guidance. (Sources: [Amazon.com, Inc., via SEC EDGAR](https://www.sec.gov/Archives/edgar/data/0001018724/000101872426000038/amzn-20260930xex991.htm), [Capp Notes](https://cappnotes.substack.com/p/closing-look-thursday-october-29))

September PCE inflation rose to 3.6% from a year earlier, with core inflation at 3.1%, and third-quarter growth came in at 3.4% annualised. The 10-year Treasury yield still fell 7 basis points to 4.98%. (Sources: [Capp Notes](https://cappnotes.substack.com/p/closing-look-thursday-october-29), [TradingKey](https://www.tradingkey.com/analysis/stocks/us-stocks/262258198-us-pce-inflation-3-6-percent-alphabet-plunge-12-6-percent-nasdaq-amazon-intel-weak-tradingkey))

F-003 held: Bitcoin did not close above $84,000 on any day after publication, and its highest close since was $81,328 on 23 October. Three calls are decided at today’s close, and F-014 is the live one. It fails if the Nasdaq closes below 26,000 with the 10-year yield below 5.10%, and the index is 0.7% above that line. (Sources: [Capp Notes](https://cappnotes.substack.com/p/closing-look-thursday-october-29), [CoinGecko](https://www.coingecko.com/en/coins/bitcoin/historical_data))

## The Board

| Market | Level | Move | Why |
| --- | --- | --- | --- |
| Nasdaq Composite | 26,185 | −1.38% | Alphabet’s worst day pulls the Nasdaq lower, and Amazon faces the same test |
| S&P 500 | 7,720 | −0.3% | Close. About 80% of members rose. |
| Dow Jones | 52,343 | −0.25% | Close. |
| US 10-year yield | 4.98% | −7 bp | Market level at the close. The official FRED figure follows. |
| Brent crude | $114.88 | −0.38% | December contract settlement. It expires today; calls move to January. |
| US crude | $102.00 | −0.76% | Front-month settlement. |
| Gold | $4,032 | −0.49% | December contract settlement. F-004 fails below $4,000 with the 10-year below 5%. |

## Cause Files

### [Alphabet’s worst day pulls the Nasdaq lower, and Amazon faces the same test](https://causamarkets.com/cause/alphabet-worst-day-amazon-cash-test/)

Nasdaq Composite −1.38% to 26,184.72. Evidence grade B.

Alphabet’s 12.6% fall, after a cash shortfall and a profit miss, pulled the Nasdaq down 1.4% while most stocks rose. After the close Amazon showed the same pattern: AWS growth accelerated, but the build turned twelve-month free cash flow negative by $42.4 billion, and its shares fell about 6%.

Wrong if: Our read is that investors will price Amazon by its cash flow, as they priced Alphabet. If Amazon closes above $243.79, its close before the results, by 6 November, the market has looked past the cash outflow and this file is wrong. (F-018, deadline 6 November 2026)

## What we are watching

- Friday 30 October, at the close, F-002, F-005 and F-014 deadlines: F-014 is the live one: it fails on a Nasdaq close below 26,000 with the 10-year yield below 5.10%. F-002 and F-005 are well clear of their lines.
- Friday 30 October, December Brent expires: From Monday our Brent calls are ruled on the January contract, with each line adjusted by the gap between the two contracts at expiry.
- To 6 November, F-004 on gold: It fails if gold closes below $4,000 while the 10-year yield is below 5%. Gold settled at $4,031.70 on Thursday and the market yield was 4.98%.
- To 6 November, Alphabet and Amazon against their pre-results closes: F-016 and F-018 fail if either stock closes back above its close before results: $321.89 for Alphabet, $243.79 for Amazon.