Isabella Bank Corporation - Common stock (ISBA)
ISBA moved a median of 0.00% 30 minutes after news, and 0.00% by the close. How ISBA actually reacts to news — the realized, point-in-time move the market made, measured across 411 labeled events over the last three years with zero look-ahead.
ISBA’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 25% | 268 |
| 30-min | 0.00% | 36% | 304 |
| 60-min | 0.00% | 34% | 322 |
| to close | 0.00% | 42% | 380 |
| Middle 50% of ISBA reactions | -0.19% to +0.46% |
|---|---|
| Median reaction (30-min) | 0.00% |
| Measured reactions | 411 |
Half of all Isabella Bank Corporation - Common stock news events land between -0.19% and +0.46% 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 ISBA moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to ISBA's baseline. Nothing else.
Recent ISBA events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 8-K ISABELLA BANK CORP For: Oct 05 | SEC filing · Form 8-K | SEC EDGAR | -0.39% | -0.83% | |
| Isabella Bank Corporation and Grand River Commerce, Inc. Announce Receipt of Regulatory Approvals and Closing Date for Merger | Press release | ACCESS Newswire | -0.39% | -0.83% | |
| Form 8-K ISABELLA BANK CORP For: Sep 28 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -0.39% | |
| Isabella Bank Corporation and Grand River Commerce, Inc. Announce Mailing of Election Materials and Election Deadline | Press release | ACCESS Newswire | +0.00% | -0.39% | |
| Form 8-K ISABELLA BANK CORP For: Sep 21 | SEC filing · Form 8-K | SEC EDGAR | +0.60% | -0.75% | |
| Form 8-K ISABELLA BANK CORP For: Aug 27 | SEC filing · Form 8-K | SEC EDGAR | +0.15% | +2.07% | |
| Isabella Bank Corporation Announces Third Quarter 2026 Dividend | Press release | ACCESS Newswire | +0.15% | +2.07% | |
| Form 8-K ISABELLA BANK CORP For: Aug 11 | SEC filing · Form 8-K | SEC EDGAR | — | -0.57% | |
| Form 10-Q ISABELLA BANK CORP For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | — | — | |
| Form EFFECT ISABELLA BANK CORP | SEC filing · Form EFFECT | SEC EDGAR | +0.00% | -2.26% | |
| Form S-4/A ISABELLA BANK CORP | SEC filing · Form S-4 | SEC EDGAR | +0.00% | -2.26% | |
| Form S-4/A ISABELLA BANK CORP | SEC filing · Form S-4 | SEC EDGAR | -0.86% | -0.17% | |
| Form S-4 ISABELLA BANK CORP | SEC filing · Form S-4 | SEC EDGAR | +1.74% | +6.55% | |
| Form 8-K ISABELLA BANK CORP For: Jul 23 | SEC filing · Form 8-K | SEC EDGAR | +0.38% | -0.73% | |
| Isabella Bank Corporation Reports Second Quarter 2026 Earnings | Press release | ACCESS Newswire | +0.38% | -0.73% | |
| Isabella Bank Corporation Added to Russell 2000 Index | Press release | ACCESS Newswire | +0.26% | -0.23% | |
| Form 8-K ISABELLA BANK CORP For: Jun 16 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -3.05% | |
| Form 8-K ISABELLA BANK CORP For: Jun 11 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -3.05% | |
| Form 8-K ISABELLA BANK CORP For: Jun 12 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -3.49% | |
| Isabella Bank Corporation to Acquire Grand River Commerce, Inc. | Press release | ACCESS Newswire | +0.00% | -3.49% | |
| Form 8-K ISABELLA BANK CORP For: May 28 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -2.25% | |
| Isabella Bank Corporation Announces Second Quarter 2026 Dividend | Press release | ACCESS Newswire | +0.00% | -2.25% | |
| Form 8-K ISABELLA BANK CORP For: May 05 | SEC filing · Form 8-K | SEC EDGAR | — | +1.00% | |
| Form 10-Q ISABELLA BANK CORP For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -0.33% | +0.55% | |
| Form EFFECT ISABELLA BANK CORP | SEC filing · Form EFFECT | SEC EDGAR | -1.91% | -6.30% | |
| Form 8-K ISABELLA BANK CORP For: Apr 23 | SEC filing · Form 8-K | SEC EDGAR | +0.54% | -3.94% | |
| Isabella Bank Corporation Reports Strong First Quarter 2026 Earnings | Press release | ACCESS Newswire | +0.54% | -3.94% | |
| Form S-3 ISABELLA BANK CORP | SEC filing · Form S-3 | SEC EDGAR | +0.43% | -6.42% | |
| Form 8-K ISABELLA BANK CORP For: Mar 23 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -0.11% | |
| Form ARS ISABELLA BANK CORP For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +0.00% | +3.42% | |
| Form DEF 14A ISABELLA BANK CORP For: May 05 | SEC filing · Form DEF | SEC EDGAR | +0.00% | +3.42% | |
| Form TA-2 Isabella Bank Corp For: Dec 31 | SEC filing · Form TA-2 | SEC EDGAR | — | -0.07% | |
| Form 10-K ISABELLA BANK CORP For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +0.36% | -0.78% | |
| Form 8-K ISABELLA BANK CORP For: Feb 26 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -4.11% | |
| Form S-8 ISABELLA BANK CORP | SEC filing · Form S-8 | SEC EDGAR | +0.00% | -4.11% | |
| Isabella Bank Corporation Announces First Quarter 2026 Dividend | Press release | ACCESS Newswire | +0.00% | -4.11% | |
| Form 8-K ISABELLA BANK CORP For: Feb 05 | SEC filing · Form 8-K | SEC EDGAR | -8.24% | -3.40% | |
| Isabella Bank Corporation Reports Fourth Quarter and 2025 Annual Earnings | Press release | ACCESS Newswire | -8.24% | -3.40% | |
| Form 8-K ISABELLA BANK CORP For: Jan 05 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -2.11% | |
| Ritzert Joins Isabella Bank Corporation as Chief Financial Officer | Press release | ACCESS Newswire | +0.00% | -2.11% | |
| Form 8-K ISABELLA BANK CORP For: Nov 20 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +5.74% | |
| Isabella Bank Corporation Announces Fourth Quarter 2025 Dividend | Press release | ACCESS Newswire | +0.00% | +5.74% | |
| Form 10-Q ISABELLA BANK CORP For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | +5.77% | |
| Form 8-K ISABELLA BANK CORP For: Oct 27 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -1.12% | |
| Isabella Bank Corporation Reports Third Quarter 2025 Results | Press release | ACCESS Newswire | +0.00% | -1.12% | |
| Form 8-K ISABELLA BANK CORP For: Oct 06 | SEC filing · Form 8-K | SEC EDGAR | — | +4.07% | |
| Isabella Bank Appoints Financial Executive Brian Tessin to its Boards of Directors | Press release | ACCESS Newswire | — | +4.07% | |
| Form 8-K ISABELLA BANK CORP For: Sep 24 | SEC filing · Form 8-K | SEC EDGAR | — | +0.03% | |
| Form 8-K ISABELLA BANK CORP For: Aug 28 | SEC filing · Form 8-K | SEC EDGAR | — | -0.60% | |
| Form 8-K ISABELLA BANK CORP For: Aug 28 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.63% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the ISBA section they belong to.
Where else ISBA is measured.
ISBA earnings → · Analyst actions → · SEC filings →
Other Financial Services names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Cincinnati Financial Corporation (CINF) | 415 | -0.01% | 47% |
| SI FINANCIAL GROUP (SIFI) | 414 | 0.00% | 39% |
| Trinity Capital Inc. (TRIN) | 411 | -0.03% | 45% |
| FactSet Research Systems Inc. (FDS) | 410 | -0.03% | 46% |
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 Financial Services names, measured the same way →
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How the numbers are made.
How is Isabella Bank Corporation - Common stock's median reaction calculated?
Every labeled ISBA 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 411 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. 36% of ISBA'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 ISBA'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.