Navidea Biopharmaceuticals, Inc. (NAVB)
NAVB moved a median of +5.93% 30 minutes after news, and +5.93% by the close. How NAVB actually reacts to news — the realized, point-in-time move the market made, measured across 43 labeled events over the last three years with zero look-ahead.
NAVB’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | +6.25% | 60% | 37 |
| 30-min | +5.93% | 82% | 39 |
| 60-min | +8.83% | 80% | 39 |
| to close | +5.93% | 68% | 40 |
| Middle 50% of NAVB reactions | +1.21% to +5.93% |
|---|---|
| Median reaction (30-min) | +5.93% |
| Measured reactions | 43 |
Half of all Navidea Biopharmaceuticals, Inc. news events land between +1.21% and +5.93% 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 NAVB moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to NAVB's baseline. Nothing else.
Recent NAVB events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Navidea Biopharmaceuticals, Inc. Files for Bankruptcy | Press release | Business Wire | — | — | |
| Navidea Biopharmaceuticals, Inc. Announces Extension of Authority to Implement a Reverse Stock Split | Press release | Business Wire | +0.00% | +0.00% | |
| Navidea Biopharmaceuticals Announces the Extension of Plan Designed to Protect NOLs and Other Tax Assets | Press release | Business Wire | +0.00% | +0.00% | |
| Navidea Biopharmaceuticals, Inc. Announces Results of Exploratory Analysis Completed on July 2, 2024 | Press release | Business Wire | — | — | |
| Navidea Biopharmaceuticals, Inc. announces special meeting of stockholders to be held July 8, 2024 | Press release | Business Wire | — | — | |
| Form EFFECT NAVIDEA BIOPHARMACEUTICA | SEC filing · Form EFFECT | SEC EDGAR | -4.71% | -1.53% | |
| Form 15-12G NAVIDEA BIOPHARMACEUTICA | SEC filing · Form 15-12G | SEC EDGAR | +6.25% | +5.93% | |
| Form POS AM NAVIDEA BIOPHARMACEUTICA | SEC filing · Form POS | SEC EDGAR | +6.25% | +5.93% | |
| Form S-8 POS NAVIDEA BIOPHARMACEUTICA | SEC filing · Form S-8 | SEC EDGAR | +6.25% | +5.93% | |
| Navidea Biopharmaceuticals, Inc. Files Form 15 to Voluntarily Deregister and Suspend its SEC Reporting Obligations | Press release | Business Wire | +6.25% | +5.93% | |
| Form S-8 NAVIDEA BIOPHARMACEUTICA | SEC filing · Form S-8 | SEC EDGAR | +0.00% | +1.10% | |
| Form 8-K NAVIDEA BIOPHARMACEUTICA For: Nov 27 | SEC filing · Form 8-K | SEC EDGAR | -3.74% | +8.36% | |
| Navidea Biopharmaceuticals, Inc. and Capital Royalty Partners II, L.P. Enter Binding Settlement Agreement and Mutual Release | Press release | Business Wire | +9.80% | +39.80% | |
| Form 8-K NAVIDEA BIOPHARMACEUTICA For: Nov 10 | SEC filing · Form 8-K | SEC EDGAR | +9.36% | +29.76% | |
| Form 10-Q NAVIDEA BIOPHARMACEUTICA For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | -0.40% | |
| Form DEFA14A NAVIDEA BIOPHARMACEUTICA | SEC filing · Form DEFA14A | SEC EDGAR | — | +0.00% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the NAVB section they belong to.
Where else NAVB is measured.
NAVB earnings → · Analyst actions → · SEC filings →
Other Healthcare names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| OTSUKA HOLDINGS CO ADR (OTSKY) | 45 | -0.06% | 39% |
| Cipher Pharmaceuticals Inc (CPH_TSE) | 43 | -0.35% | 43% |
| POLYDEX PHARMS LTD (POLXF) | 43 | 0.00% | 35% |
| TERUMO CORP UNSP/ADR (TRUMY) | 43 | +0.14% | 61% |
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.
All Healthcare names, measured the same way →
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How the numbers are made.
How is Navidea Biopharmaceuticals, Inc.'s median reaction calculated?
Every labeled NAVB 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 43 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. 82% of NAVB'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 NAVB'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.