Marimaca Copper Corp. (MARI_TSE)
MARI_TSE moved a median of +0.56% 30 minutes after news, and +0.80% by the close. How MARI_TSE actually reacts to news — the realized, point-in-time move the market made, measured across 62 labeled events over the last three years with zero look-ahead.
MARI_TSE’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 18% | 17 |
| 30-min | +0.56% | 59% | 17 |
| 60-min | +1.33% | 65% | 17 |
| to close | +0.80% | 65% | 17 |
| Middle 50% of MARI_TSE reactions | 0.00% to +1.69% |
|---|---|
| Median reaction (30-min) | +0.56% |
| Measured reactions | 62 |
Half of all Marimaca Copper Corp. news events land between +0.00% and +1.69% 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 MARI_TSE moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to MARI_TSE's baseline. Nothing else.
Recent MARI_TSE events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Marimaca Appoints Peter Garner-Winship as CFO | Press release | ACCESS Newswire | — | — | |
| Marimaca Secures MOD Grid Connection Authorization and Agrees Key Commercial Terms for Power Supply; Provides Project Update | Press release | ACCESS Newswire | — | — | |
| Pampa Medina Continues to Deliver Extraordinary Cu-Ag Grade-Widths - Drilling Intersects 216m of 1.0% Cu and 7.2g/t Ag Including 62m of 2.2% Cu and 21.5g/t Ag from SPRD-15 | Press release | ACCESS Newswire | — | — | |
| Marimaca Copper Announces Appointment of Nicole Porcile as Independent Director | Press release | ACCESS Newswire | — | — | |
| Marimaca Copper Extends High-Grade Bornite Zone at Pampa Medina - 6m of 6.11% Cu and 24.0g/t Ag; 40m of 2.04% Cu and 11.1g/t Ag from SPRD-07 | Press release | ACCESS Newswire | — | — | |
| Marimaca Announces Results of Annual General and Special Meeting of Shareholders | Press release | ACCESS Newswire | — | — | |
| Canadian Investment Regulatory Organization Trade Resumption - MARI | Press release | Canada Newswire | — | — | |
| Canadian Investment Regulatory Organization Trading Halt - MARI | Press release | Canada Newswire | — | — | |
| Pampa Medina Sulphide Drilling Intersects 16m of 5.70% Cu and 62.6 g/t Ag including 4m of 11.32% Cu and 144.0 g/t Ag in Significant Extension of UHG Bornite Zone | Press release | ACCESS Newswire | — | — | |
| Drilling Program at Pampa Medina Continues to Demonstrate Continuity and Scale of Sediment-Hosted Copper System | Press release | ACCESS Newswire | — | — | |
| Marimaca Provides Positive Progress Update on the MOD and Sulphuric Acid Strategy | Press release | ACCESS Newswire | — | — | |
| Marimaca Reports Additional High-Grade Silver Assays from Consolidated Drill Results at Pampa Medina | Press release | ACCESS Newswire | — | — | |
| Marimaca Announces the Appointment of Zenon Wozniak to its Board of Directors; Giancarlo Bruno appointed Independent Non-Executive Chair; Board Changes | Press release | ACCESS Newswire | — | — | |
| Marimaca Reports Further High-Grade Copper and Silver Intersections more than 600m from Pampa Medina West Step-Out Drilling | Press release | ACCESS Newswire | — | — | |
| Marimaca Announces Senior Management Updates | Press release | ACCESS Newswire | — | — | |
| Marimaca Copper Announces Closing of Australian Offering to Complete Global Offering of C$409 Million (~A$423 Million) | Press release | ACCESS Newswire | — | — | |
| Marimaca Copper Announces Closing of Canadian Offering for C$257 Million (~A$266 Million) of C$409 Million (~A$423 Million) Global Offering | Press release | ACCESS Newswire | — | — | |
| Canadian Investment Regulatory Organization Trade Resumption - MARI | Press release | Canada Newswire | — | — | |
| Canadian Investment Regulatory Organization Trading Halt - MARI | Press release | Canada Newswire | — | — | |
| Pampa Medina Scout Drilling Delivers Significant Oxide Extensions; Western Deep Sulphide Drilling Pending | Press release | ACCESS Newswire | — | — | |
| Marimaca Announces Receipt of Environmental Approval for the Marimaca Oxide Deposit | Press release | GlobeNewswire | — | — | |
| Pampa Medina Drilling Continues to Validate Sedimentary-Hosted Copper Manto Model | Press release | GlobeNewswire | — | — | |
| Marimaca Regretfully Announces the Passing of Colin Kinley | Press release | GlobeNewswire | — | — | |
| Marimaca Copper Files NI 43-101 Technical Report for the Previously Announced Marimaca Oxide Deposit Feasibility Study | Press release | GlobeNewswire | — | — | |
| Marimaca Copper Announces Closing of A$80,000,000 Placement | Press release | GlobeNewswire | — | — | |
| Canadian Investment Regulatory Organization Trade Resumption - MARI | Press release | Canada Newswire | — | — | |
| Marimaca Copper Completes A$80,000,000 Bookbuild | Press release | GlobeNewswire | — | — | |
| Canadian Investment Regulatory Organization Trading Halt - MARI | Press release | Canada Newswire | — | — | |
| Marimaca Copper – Update to A$80,000,000 Placement | Press release | GlobeNewswire | — | — | |
| Marimaca Copper Announces A$80,000,000 Placement | Press release | GlobeNewswire | — | — | |
| MOD Feasibility Study Confirms Robust Capital Intensity and 31%+ IRR; Maiden Ore Reserve | Press release | GlobeNewswire | — | — | |
| Marimaca Copper Announces Option to Acquire 150ktpa Sulfuric Acid Plant | Press release | GlobeNewswire | — | — | |
| High-Grade Sediment Hosted Mineralization Extended at Pampa Medina – 300m Western Step-out SMRD-16 Intersects 10m of 4.2% Cu within 70m of 1.0% Cu | Press release | GlobeNewswire | — | — | |
| Marimaca Drills Pampa Medina Sulphides – Intersects Exceptional 6m of 12.0% Cu within 26m of 4.1% Cu in dominantly Bornite in SMRD-13, 40m of 2.1% Cu in SMD-02 | Press release | GlobeNewswire | — | — | |
| Marimaca Announces Results of Annual General Meeting of Shareholders | Press release | GlobeNewswire | — | — | |
| Marimaca Extends Pampa Medina Norte Discovery – Intersects 68m at 1.20% and 40m at 1.07% CuT in Dominantly Oxides with Assays Pending for Deep Sulphide Extension | Press release | GlobeNewswire | — | — | |
| Marimaca Defines Large Sediment and Volcanic Hosted Manto Copper System across the Pampa Medina Area | Press release | GlobeNewswire | — | — | |
| Correction: Marimaca Commences Trading on the Australian Securities Exchange | Press release | GlobeNewswire | — | — | |
| Marimaca Commences Trading on the Australian Securities Exchange | Press release | GlobeNewswire | — | — | |
| Marimaca Progresses DIA Environmental Permitting Process with Receipt of ICSARA | Press release | GlobeNewswire | — | — | |
| Marimaca Appoints Stantec to Progress PEA for the Integration of the Pampa Medina Project | Press release | GlobeNewswire | — | — | |
| Marimaca Announces Lodgement of Prospectus for Proposed Listing on the Australian Securities Exchange | Press release | GlobeNewswire | — | — | |
| Marimaca Makes Pampa Medina Norte Discovery – Intersects 18m at 5.1% CuT within 102m at 1.2% CuT, both within a broad zone of 400m at 0.5% CuT | Press release | GlobeNewswire | — | — | |
| Marimaca Signs Binding Option to Acquire the Madrugador Project, Further Consolidating the SdM Exploration District | Press release | GlobeNewswire | — | — | |
| Marimaca Extends Shallow Oxide Potential at Mercedes Satellite Target | Press release | GlobeNewswire | — | — | |
| Marimaca Initiates ASX Dual Listing Process | Press release | GlobeNewswire | — | — | |
| Marimaca Signs Binding Option to Acquire the Pampa Medina Project | Press release | GlobeNewswire | — | — | |
| Marimaca Appoints Oscar Valenzuela as VP Project and Alexis Muñoz as VP Project Execution | Press release | GlobeNewswire | -3.88% | -3.10% | |
| Marimaca: Channel Sampling at the Mercedes Satellite Target Intersects 80m at 0.41% CuT; Exploration Drilling Commences | Press release | GlobeNewswire | +0.00% | -1.55% | |
| Marimaca Copper Announces the Appointment of Kieran Daly to its Board of Directors | Press release | GlobeNewswire | +0.00% | -1.02% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the MARI_TSE section they belong to.
Where else MARI_TSE is measured.
MARI_TSE earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is Marimaca Copper Corp.'s median reaction calculated?
Every labeled MARI_TSE 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 62 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. 59% of MARI_TSE'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 MARI_TSE'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.