AMER BUSINESS BK CA (AMBZ)
AMBZ moved a median of +0.07% 30 minutes after news, and +0.53% by the close. How AMBZ actually reacts to news — the realized, point-in-time move the market made, measured across 33 labeled events over the last three years with zero look-ahead.
AMBZ’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | +0.02% | 50% | 30 |
| 30-min | +0.07% | 60% | 30 |
| 60-min | +0.38% | 63% | 30 |
| to close | +0.53% | 73% | 30 |
| Middle 50% of AMBZ reactions | 0.00% to +1.16% |
|---|---|
| Median reaction (30-min) | +0.07% |
| Measured reactions | 33 |
Half of all AMER BUSINESS BK CA news events land between +0.00% and +1.16% 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 AMBZ moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to AMBZ's baseline. Nothing else.
Recent AMBZ events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| David Mitsuuchi Joins American Business Bank as Regional Executive Vice President of the San Fernando Valley | Press release | Business Wire | — | — | |
| American Business Bank Announces Authorization of Third Stock Repurchase Program | Press release | Business Wire | +0.04% | +0.04% | |
| American Business Bank Announces Quarterly and Special Cash Dividend | Press release | Business Wire | +0.92% | -0.30% | |
| American Business Bank Reports Record Quarterly Earnings of $16.2 Million | Press release | Business Wire | +0.07% | -0.89% | |
| American Business Bank Ranked 6th in Top 50 Community Banks With Assets Between $3 Billion and $10 Billion for 2025 | Press release | Business Wire | +0.00% | +0.00% | |
| American Business Bank Reports Record Quarterly Earnings of $15.9 Million | Press release | Business Wire | +1.03% | +0.01% | |
| American Business Bank Announces Quarterly Cash Dividend | Press release | Business Wire | +0.00% | +0.28% | |
| American Business Bank Announces Retirement of Jon Schlobohm From Board of Directors | Press release | Business Wire | +0.00% | +0.08% | |
| American Business Bank Announces Increase in Quarterly Cash Dividend | Press release | Business Wire | +0.87% | +0.87% | |
| American Business Bank Ranked in 2026 Best 50 Top Performing Companies Traded on OTCQX | Press release | Business Wire | — | — | |
| American Business Bank Reports Record Quarterly Earnings of $14.8 Million | Press release | Business Wire | +0.84% | +6.67% | |
| American Business Bank Promotes Weatherill to Regional Vice President, Inland Empire Region | Press release | Business Wire | +0.00% | +1.41% | |
| American Business Bank Promotes Dole, Basirico to Executive Officers | Press release | Business Wire | +0.58% | +0.58% | |
| American Business Bank Declares Cash Dividend | Press release | Business Wire | +0.00% | +0.52% | |
| American Business Bank Reports Record Quarterly Earnings of $14.3 Million | Press release | Business Wire | +0.00% | +2.86% | |
| American Business Bank Receives Regulatory Approval on Second Stock Repurchase Program | Press release | Business Wire | +0.00% | +0.08% | |
| American Business Bank Opens New Loan Production Office in Downtown Riverside, California | Press release | Business Wire | +0.00% | +0.00% | |
| American Business Bank Announces Completion of Stock Repurchase Program | Press release | Business Wire | -0.43% | -0.52% | |
| American Business Bank Declares Cash Dividend | Press release | Business Wire | +0.00% | -1.83% | |
| American Business Bank Reports Second Quarter Earnings Per Share Growth of 12% | Press release | Business Wire | +0.86% | -0.08% | |
| American Business Bank Reports First Quarter Earnings | Press release | Business Wire | +0.14% | +0.26% | |
| American Business Bank Declares Cash Dividend | Press release | Business Wire | +1.55% | +1.55% | |
| American Business Bank Supports Seven Local Charities Serving LA Fire Victims | Press release | Business Wire | +0.14% | +1.89% | |
| American Business Bank Declares Cash Dividend | Press release | Business Wire | +0.31% | +0.55% | |
| American Business Bank Ranked Top 10 in US Banks in Inaugural Deposits Ranking With Assets Between $3 Billion and $10 Billion for 2024 | Press release | Business Wire | +0.00% | +2.38% | |
| American Business Bank Reports Fourth Quarter Earnings | Press release | Business Wire | +0.28% | +2.08% | |
| American Business Bank Announces Stock Repurchase Program | Press release | Business Wire | +0.00% | +4.69% | |
| American Business Bank Announces New Loan Production Office in San Diego, California | Press release | Business Wire | — | — | |
| American Business Bank Reports Third Quarter Earnings | Press release | Business Wire | +0.00% | +1.26% | |
| American Business Bank Reports Second Quarter Earnings | Press release | Business Wire | +0.00% | +0.83% | |
| American Business Bank Reports First Quarter Earnings | Press release | Business Wire | +1.02% | +1.02% | |
| American Business Bank Reports Fourth Quarter Earnings | Press release | Business Wire | +1.24% | +9.71% | |
| American Business Bank Reports Third Quarter Earnings | Press release | Business Wire | +0.00% | -0.03% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the AMBZ section they belong to.
Where else AMBZ is measured.
AMBZ earnings → · Analyst actions → · SEC filings →
Other Financial Services names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Urbana Corp (URB_TSE) | 35 | 0.00% | 0% |
| Invesco High Income Trust II (VLT) | 35 | 0.00% | 46% |
| CBB BANCORP INC (CBBI) | 33 | -0.30% | 17% |
| SBI HOLDINGS INC ORD (SBHGF) | 33 | 0.00% | 23% |
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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Every name we’ve measured, in one place.
How the numbers are made.
How is AMER BUSINESS BK CA's median reaction calculated?
Every labeled AMBZ 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 33 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. 60% of AMBZ'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 AMBZ'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.