WEBMD HEALTH (WBMD)
WBMD moved a median of +0.03% 30 minutes after news, and -0.02% by the close. How WBMD actually reacts to news — the realized, point-in-time move the market made, measured across 821 labeled events over its full measured history with zero look-ahead.
WBMD’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 46% | 805 |
| 30-min | +0.03% | 54% | 806 |
| 60-min | 0.00% | 48% | 806 |
| to close | -0.02% | 49% | 806 |
| Middle 50% of WBMD reactions | -0.34% to +0.53% |
|---|---|
| Median reaction (30-min) | +0.03% |
| Measured reactions | 821 |
Half of all WEBMD HEALTH news events land between -0.34% and +0.53% 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 WBMD moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to WBMD's baseline. Nothing else.
Where else WBMD is measured.
WBMD earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is WEBMD HEALTH's median reaction calculated?
Every labeled WBMD 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 821 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. 54% of WBMD'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 WBMD'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.