Ceridian HCM Holding Inc. (CDAY)
CDAY moved a median of 0.00% 30 minutes after news, and -0.26% by the close. How CDAY actually reacts to news — the realized, point-in-time move the market made, measured across 44 labeled events over the last three years with zero look-ahead.
CDAY’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | -0.04% | 48% | 42 |
| 30-min | 0.00% | 38% | 42 |
| 60-min | -0.31% | 26% | 42 |
| to close | -0.26% | 36% | 42 |
| Middle 50% of CDAY reactions | -0.65% to +0.47% |
|---|---|
| Median reaction (30-min) | 0.00% |
| Measured reactions | 44 |
Half of all Ceridian HCM Holding Inc. news events land between -0.65% and +0.47% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when CDAY moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to CDAY's baseline. Nothing else.
Recent CDAY events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 8-K Dayforce, Inc. For: Jan 31 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Ceridian to change ticker symbol to ‘DAY’ on NYSE and TSX effective February 1 | Press release | GlobeNewswire | +0.45% | +1.39% | |
| Ceridian to Announce Fourth Quarter and Full-Year 2023 Financial Results on February 7th | Press release | GlobeNewswire | +0.42% | +0.09% | |
| Global Retailers Choose Dayforce to Optimize Workforce Planning and the Frontline Employee Experience | Press release | GlobeNewswire | +0.93% | +3.88% | |
| Ceridian Announces New Executive Leadership Hires for Finance, Strategy | Press release | GlobeNewswire | -0.47% | -2.72% | |
| Form 8-K Ceridian HCM Holding For: Dec 04 | SEC filing · Form 8-K | SEC EDGAR | -0.47% | -2.72% | |
| Form 10-K/A Ceridian HCM Holding For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +0.29% | -0.26% | |
| Form 10-Q Ceridian HCM Holding For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.29% | -0.26% | |
| Form 10-Q/A Ceridian HCM Holding For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.29% | -0.26% | |
| Form 10-Q/A Ceridian HCM Holding For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.29% | -0.26% | |
| Form 8-K Ceridian HCM Holding For: Nov 10 | SEC filing · Form 8-K | SEC EDGAR | +0.29% | -0.26% | |
| Form NT 10-Q Ceridian HCM Holding For: Sep 30 | SEC filing · Form NT | SEC EDGAR | +0.29% | -0.26% | |
| Ceridian Files Form 12b-25 | Press release | GlobeNewswire | -0.05% | +0.69% | |
| Ceridian to Present at Upcoming Investor Conferences | Press release | GlobeNewswire | -2.79% | -3.35% | |
| Ceridian Announces Departure of Co-CEO Leagh Turner as David Ossip Continues in Chair and CEO Roles | Press release | GlobeNewswire | +1.44% | -1.31% | |
| Ceridian Reports Third Quarter 2023 Results | Press release | GlobeNewswire | +1.44% | -1.31% | |
| Form 8-K Ceridian HCM Holding For: Nov 01 | SEC filing · Form 8-K | SEC EDGAR | +1.44% | -1.31% | |
| Ceridian Announces Time Change for Third Quarter 2023 Financial Results on November 1 | Press release | GlobeNewswire | +1.44% | -1.31% | |
| Ceridian Named a Leader in the 2023 Gartner® Magic Quadrant™ for Cloud HCM Suites for 1,000+ Employee Enterprises for Fourth Consecutive Year | Press release | GlobeNewswire | -0.04% | -0.18% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the CDAY section they belong to.
Where else CDAY is measured.
CDAY earnings → · Analyst actions → · SEC filings →
Other Technology names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Pintec Technology Holdings Limited - American Depositary Shares (PT) | 45 | 0.00% | 49% |
| BIGG DIGITAL ASSETS INC (BBKCF) | 44 | 0.00% | 48% |
| Computer Modelling Group Ltd (CMG_TSE) | 44 | +1.10% | 56% |
| PAID INC (PAYD) | 44 | 0.00% | 27% |
Same sector, same measurement: percent move vs. the price at the news timestamp, read at 30 minutes. Sample sizes differ, so the medians are comparable but the confidence behind them is not.
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How the numbers are made.
How is Ceridian HCM Holding Inc.'s median reaction calculated?
Every labeled CDAY news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 44 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 38% of CDAY's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does CDAY's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.