Amazon's SEC filing (Form 8-K) moved AMZN -2.27%
AMZN moved +0.06% in five minutes and -2.27% by market close — about 62.9× Amazon's median close-day move.
· SEC EDGAR · SEC filing · Form 8-K · Realized reaction, point-in-time, zero look-ahead.
Form 8-K AMAZON COM INC For: Apr 10
Via SEC EDGAR
How AMZN reacted after the announcement.
| Horizon | Reaction | AMZN median |
|---|---|---|
| 30 sec | -0.04% | — |
| 1 min | -0.18% | — |
| 5 min | +0.06% | — |
| 10 min | +0.13% | — |
| 30 min | -0.65% | -0.11% |
| 60 min | -0.30% | — |
| 90 min | -1.41% | — |
| 120 min | -1.56% | — |
| to close | -2.27% | -0.04% |
- +1%
- never traded
- +2%
- never traded
- +3%
- never traded
- +5%
- never traded
- -1%
- 31 min
- -2%
- 123 min
- -3%
- 148 min
- -5%
- 173 min
A hatched rung is a threshold the price never touched inside the measured window — not a missing measurement. Most news never moves a large-cap by 5% either way, so a mostly empty ladder is the finding, not a gap in the data.
| Held for | Return |
|---|---|
| D+1 | -3.10% |
| D+2 | -1.14% |
| D+3 | -2.61% |
| D+4 | -3.97% |
| D+5 | -6.78% |
| 1M | +3.24% |
| 3M | +19.00% |
| 6M | +21.78% |
| 12M | +24.94% |
Each row is measured from the price at the news to that horizon independently, so the ladder is not cumulative and a later row can sit above an earlier one. “Available” is a date, not a gap: that horizon has not elapsed yet for this event, and it is computed from the event’s own timestamp rather than from the data. An em dash is the other case — the horizon passed and no return was recorded.
Five minutes after the news, AMZN had moved +0.06%; by the close it stood at -2.27% — the two readings disagree in direction, and the early move did not survive to the close.
Impact: Negative. Reaction = percent move vs. the price at the news timestamp. Sources below.
AMZN’s news landed in the pre-market window; the main session closed -2.27%.
- Mainprior session
- After-hours4:00 – 8:00 PM
- Overnightno tape
- Pre-market4:00 – 9:30 AM
- Main session9:30 AM – 4:00 PM
Segment widths are fixed, so two events on different days sit in comparable places. Hatched segments are real elapsed time with no tape to measure — the overnight halt is not a gap in the data. This event carries no intraday receipt time, so it is not pinned to a minute.
| Window | What it answers | Anchor price | Result | vs S&P 500 |
|---|---|---|---|---|
| All | From the news to the first main-session close, across every session in between. | 186.87re-anchored to the first print after the news | -3.10% | — |
| After-hours | The move between the closing bell and the overnight halt. | — | not measured | — |
| Pre-market | The move between the pre-market open and the opening bell. | — | not measured | — |
| Main | The move inside the regular session, from the news to the close. | 185.42the price at the news | -2.27% | -0.86% |
The main-session result is measured upstream against the price at the news; the all-sessions result is computed here from its own anchor and close, so the two can differ in the last decimal. The adjusted column subtracts the S&P 500’s move over the same main-session span — there is no index anchor for the all-sessions span, so that cell stays empty rather than borrowing this one. After-hours and pre-market are measured upstream but populate on a small minority of events, so this page does not request them. Those rows are unmeasured, not empty.
The same event measured across every session8
| Horizon | Reaction |
|---|---|
| 30 sec | +0.04% |
| 1 min | +0.06% |
| 5 min | +0.07% |
| 10 min | +0.29% |
| 30 min | +0.21% |
| 60 min | -0.25% |
| 90 min | -0.27% |
| 120 min | -0.08% |
Where this AMZN event came from, and what the tape did with it.
Amazon filed Form 8-K with the SEC on Apr 10, 2025. It was one of 5 Amazon headlines News Quantified labeled that day, so its measurement window overlaps with the others on a shared tape. The same session also carried Amazon's "AI-Powered Service Robots Redefine Hospitality as Industry Innovators…" and 2 other Amazon headlines, each measured on its own clock.
Against the price at the news timestamp, AMZN moved +0.06% after five minutes and -2.27% by the close — about 62.9× Amazon's median close-day move of -0.04% across 2,000+ events. Because several releases shared that day, their measurement windows overlap and no single headline cleanly owns the move.
This is the alert you’d have received.
Form 8-K AMAZON COM INC For: Apr 10
Track AMZN and you’ll get one email like this the next time it moves on news — the headline, the measured reaction, and how it compares to AMZN’s baseline. Nothing else.
Set up AMZN alerts →How this compares to AMZN’s usual reaction.
Across 2,000+ labeled events, AMZN’s median 30-minute reaction to all news is -0.11% (46% up); by the close it is -0.04%.
| Middle 50% of AMZN reactions | -0.46% to +0.47% |
|---|---|
| Median reaction (30-min) | -0.11% |
| This event | -0.65% |
| Measured reactions | 2,000+ |
Half of all Amazon news events land between -0.46% and +0.47% at 30 minutes; this one is a single draw from that distribution.
You just saw one reaction. There are 26M+ more.
See the full AMZN reaction history →AMZN’s session ranged -5.16% to +0.78% against the price at the news.
48.6M shares against a 30-day average of 39.8M.
What the average share actually traded at across the session, rather than at any one print.
The close moved -2.27% against a 20-day average true range of 11.58. AMZN carries no market-cap or price-to-earnings figure on this record, and no short interest, so none is shown.
Email me when AMZN moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to AMZN's baseline. Nothing else.
How comparable AMZN events have landed.
Across 5 other recent Amazon SEC filing events, the median close-day reaction was +0.68%. Each is measured the same way, from its own news timestamp.
| Date | Headline | 5-min | To close |
|---|---|---|---|
| Form 8-A12B AMAZON COM INC | +0.60% | +1.46% | |
| Form CERT AMAZON COM INC | +0.62% | +0.46% | |
| Form 8-K AMAZON COM INC For: Sep 14 | -0.03% | -1.54% | |
| Form 8-K AMAZON COM INC For: Sep 08 | +0.44% | +0.68% | |
| Form EFFECT AMAZON COM INC | -0.38% | +1.95% |
8 more AMZN events, each measured the same way.
Recent AMZN events, each with its measured reaction8
That same day, across the market7
Same measurement, same clock, different names — each headline measured from its own news timestamp, point-in-time.
Peer tickers, measured the same way4
| Ticker | Most recent event | 5-min | To close |
|---|---|---|---|
| Tesla (TSLA) | Tesla Third Quarter 2026 Production, Deliveries & Deployments | +1.75% | +2.86% |
| Home Depot (HD) | The Home Depot Announces 2026 Innovation Award Winners | -0.05% | +0.27% |
| Apple (AAPL) | MacStadium and Presidio Partner to Bring Apple to the Enterprise | -0.03% | -0.81% |
| NVIDIA (NVDA) | NVIDIA RTX Spark PCs Available Today — A New Beginning for Windows PCs | -0.11% | -1.20% |
Every US ticker is measured the same way, from its own news timestamp. Browse all tickers →
AMZN carried 4 other records that day.
Each was measured the same way, from its own timestamp.
| Record | Event | 5-min | To close |
|---|---|---|---|
| AI-Powered Service Robots Redefine Hospitality as Industry Innovators Lead the Charge | Press release | +0.06% | -2.27% |
| Form ARS AMAZON COM INC For: Dec 31 | SEC filing · Form ARS | +0.06% | -2.27% |
| Form DEF 14A AMAZON COM INC For: May 21 | SEC filing · Form DEF | +0.06% | -2.27% |
| Form DEFA14A AMAZON COM INC | SEC filing · Form DEFA14A | +0.06% | -2.27% |
How the numbers are made.
How was AMZN's +0.06% reaction measured?
From the news timestamp, not the trading day: News Quantified takes the last trade before this SEC filing (Form 8-K) as the base price and measures the move five minutes of trading later — point-in-time, zero look-ahead. The same clock produced the -2.27% to-close figure.
What is Amazon's median reaction, and how does this event compare?
Amazon's median is drawn from 2,000+ labeled events; at 30 minutes it sits at -0.11%, and -0.04% by the close. This event's move is one draw from that distribution — ordinary or outlier, the chart's median ticks show which.
5 Amazon headlines shared Apr 10, 2025. Whose reaction is this?
Each of the 5 same-day Amazon events is measured from its own timestamp, but their windows overlap on one tape, so we show the cluster rather than pretending a single headline owns the move.
Does -2.27% predict Amazon's next reaction?
No. -2.27% is a realized fact about Apr 10, 2025, not a forecast. Past reactions describe a distribution; they say nothing certain about any future move.
How to cite this reaction.
News Quantified. "Form 8-K AMAZON COM INC For: Apr 10." AMZN realized price reaction, Apr 10, 2025. Retrieved from https://newsquantified.com/tickers/amzn/news/form-8-k-amazon-com-for-apr-10-2025-04-10
Canonical URL: https://newsquantified.com/tickers/amzn/news/form-8-k-amazon-com-for-apr-10-2025-04-10
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