Sintana Energy Inc (SEI_CDNX)
SEI_CDNX moved a median of -0.44% 30 minutes after news, and -0.91% by the close. How SEI_CDNX actually reacts to news — the realized, point-in-time move the market made, measured across 155 labeled events over the last three years with zero look-ahead.
SEI_CDNX’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 21% | 14 |
| 30-min | -0.44% | 29% | 14 |
| 60-min | -0.48% | 21% | 14 |
| to close | -0.91% | 43% | 14 |
| Middle 50% of SEI_CDNX reactions | -1.16% to +1.50% |
|---|---|
| Median reaction (30-min) | -0.44% |
| Measured reactions | 155 |
Half of all Sintana Energy Inc news events land between -1.16% and +1.50% 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 SEI_CDNX moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to SEI_CDNX's baseline. Nothing else.
Recent SEI_CDNX events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| PEL 90 Participating Interest Exchange with Chevron | Press release | ACCESS Newswire | — | — | |
| KON-16, Angola: Execution of Definitive Transaction Documentation | Press release | ACCESS Newswire | — | — | |
| TotalEnergies' Completes Entry and Becomes Operator of PEL 83 | Press release | ACCESS Newswire | — | — | |
| Interim Results for the Three Months Ended 30 June 2026 | Press release | ACCESS Newswire | — | — | |
| Portfolio Update - Strategic Investment in Maravilla Oil and Gas | Press release | ACCESS Newswire | — | — | |
| Broker Appointment | Press release | ACCESS Newswire | — | — | |
| Results of AGM and Management Update Presentation | Press release | ACCESS Newswire | — | — | |
| Shareholder Presentation via Investor Meet Company | Press release | ACCESS Newswire | — | — | |
| Latin-America Updates | Press release | ACCESS Newswire | — | — | |
| Mid-Year Operational and Corporate Update | Press release | ACCESS Newswire | — | — | |
| Exercise of Restricted Share Units | Press release | ACCESS Newswire | — | — | |
| Notice of Annual and Special Meeting of Shareholders | Press release | ACCESS Newswire | — | — | |
| Exercise of Options | Press release | ACCESS Newswire | — | — | |
| Closing of Fundraise | Press release | ACCESS Newswire | — | — | |
| Exercise of Options | Press release | ACCESS Newswire | — | — | |
| TSX-V Approval and PDMR Dealing | Press release | ACCESS Newswire | — | — | |
| Result of Fundraise | Press release | ACCESS Newswire | — | — | |
| Interim Results For The Three Months Ended March 31, 2026 | Press release | ACCESS Newswire | — | — | |
| Proposed Offering of Common Shares | Press release | ACCESS Newswire | — | — | |
| Audited Annual Results for the Year Ended December 31, 2025 | Press release | ACCESS Newswire | — | — | |
| Exercise of Options | Press release | ACCESS Newswire | — | — | |
| Oil & Gas Virtual Investor Conference: Presentations Now Available for Online Viewing | Press release | GlobeNewswire | — | — | |
| Intention to List on the Namibia Securities Exchange | Press release | ACCESS Newswire | — | — | |
| Sintana Energy to Present at the Oil & Gas Virtual Investor Conference April 16th | Press release | GlobeNewswire | — | — | |
| Oil & Gas Companies to Present at Virtual Investor Conference on April 16th | Press release | GlobeNewswire | — | — | |
| Portfolio Update | Press release | ACCESS Newswire | — | — | |
| Sintana Announces Amendments to its By-Laws | Press release | ACCESS Newswire | — | — | |
| PEL87 Extension Granted | Press release | ACCESS Newswire | — | — | |
| Sintana Energy Inc. Announces Commencement of 3D Seismic Acquisition Area Off-1, Uruguay | Press release | ACCESS Newswire | — | — | |
| Sintana Energy Inc. Announces VMM-37 Resolution | Press release | ACCESS Newswire | — | — | |
| Sintana Energy Inc. Provides Portfolio Update - Walvis Basin Expansion | Press release | ACCESS Newswire | — | — | |
| Sintana Energy Inc. Provides MI 61-101 Disclosure in Connection with Challenger Acquisition | Press release | ACCESS Newswire | — | — | |
| Sintana Energy Inc. Announces Grant of Restricted Share Units and Issue of Shares | Press release | ACCESS Newswire | — | — | |
| Sintana Energy Inc. Announces Admission to Trading on AIM | Press release | GlobeNewswire | — | — | |
| Sintana Energy Inc. Announces Publication of Admission Document | Press release | GlobeNewswire | — | — | |
| Sintana Energy Inc. Announces Scheme of Arrangement Becomes Effective | Press release | GlobeNewswire | — | — | |
| Sintana Energy Inc. Announces Court Sanction of Scheme of Arrangement and Issue of Shares | Press release | GlobeNewswire | — | — | |
| PEL 83 – TotalEnergies to Enter as Operator | Press release | GlobeNewswire | — | — | |
| Sintana Energy Inc. Provides Rule 2.9 Announcement | Press release | GlobeNewswire | — | — | |
| Sintana Energy Inc. Provides Update on Conditions and Timetable | Press release | GlobeNewswire | — | — | |
| Sintana Energy Inc. Announces Results of Court Meeting and General Meeting | Press release | GlobeNewswire | — | — | |
| Sintana Energy Inc. Announces SEDAR Filing | Press release | GlobeNewswire | — | — | |
| Challenger Energy Group plc Acquisition an Update Letter to Shareholders | Press release | GlobeNewswire | — | — | |
| Sintana Energy Inc. Announces Publication of Scheme Document in Connection with Acquisition of Challenger Energy Group plc | Press release | GlobeNewswire | — | — | |
| Challenger Energy Group PLC Acquisition Update | Press release | GlobeNewswire | — | — | |
| Sintana Energy Inc. Announces Sedar+ Filing | Press release | GlobeNewswire | — | — | |
| Sintana Energy Inc. Announces Acquisition of Challenger Energy Group PLC | Press release | GlobeNewswire | — | — | |
| Portfolio Update – PEL 79 License Extension | Press release | GlobeNewswire | — | — | |
| 2025 Incentive Awards | Press release | GlobeNewswire | — | — | |
| Angola Entry via Strategic Partnership with Corcel plc Investment in KON-16 Onshore Kwanza Basin | Press release | GlobeNewswire | — | — |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the SEI_CDNX section they belong to.
Where else SEI_CDNX is measured.
SEI_CDNX earnings → · Analyst actions → · SEC filings →
Other Energy names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Evolution Petroleum Corporation, Inc. (EPM) | 157 | -0.24% | 43% |
| Gulf Island Fabrication, Inc. (GIFI) | 157 | 0.00% | 45% |
| Genie Energy Ltd. Class B Stock (GNE) | 153 | +0.03% | 52% |
| HOMELAND RES LTD NEW (HMLA) | 152 | 0.00% | 24% |
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 Energy names, measured the same way →
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How the numbers are made.
How is Sintana Energy Inc's median reaction calculated?
Every labeled SEI_CDNX 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 155 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. 29% of SEI_CDNX'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 SEI_CDNX'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.