TransAlta Corporation Ordinary Shares (TAC) by event type
TAC moves most on analyst upgrades — a median of +0.61% at 30 minutes across 27 measured events. Each row is measured over the last three years and read against the price at its own news timestamp. Back to the TAC overview →
How TAC reacts across 3 measured event types.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades 279 of 2,717 | 27 | +0.61% | 59% | -0.22% |
| Analyst downgrades 2,089 of 2,603 | 23 | -0.37% | 48% | +0.57% |
| Rating reiterations 2,999 of 3,522 | 18 | -0.23% | 39% | -0.04% |
Last 3 years, pulled 2026-09-21. Reaction = percent move vs. the price at the news timestamp. Counts and medians only. The rank under each event type orders every name measured for it by median 30-min reaction, most positive first — so a low rank on a downgrade means this name falls harder than most, not that it moves less. Names with an identical median share a rank; a name the cross-section does not carry shows no rank rather than a guessed one. 3 further classes were observed with fewer than 10 measured events and are not published.
That’s how TAC usually reacts — get an email when it moves on news →Every name measured for these event types: Analyst upgrades → · Analyst downgrades → · Rating reiterations → · TAC overview →
Other Utilities names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Enel Americas S.A. American Depositary Shares (ENIA) | 232 | -0.06% | 41% |
| Companhia de saneamento Basico Do Estado De Sao Paulo - Sabesp American Depositary Shares (Each repstg 250 Common Shares) (SBS) | 227 | 0.00% | 50% |
| PENNON GROUP PLC UNSP/ADR (PEGRY) | 226 | 0.00% | 20% |
| American States Water Company (AWR) | 218 | -0.01% | 45% |
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.