Sierra Metals Inc. (SMTS)
SMTS moved a median of 0.00% 30 minutes after news, and -0.33% by the close. How SMTS actually reacts to news — the realized, point-in-time move the market made, measured across 593 labeled events over its full measured history with zero look-ahead.
SMTS’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 31% | 524 |
| 30-min | 0.00% | 37% | 554 |
| 60-min | 0.00% | 43% | 570 |
| to close | -0.33% | 42% | 581 |
| Middle 50% of SMTS reactions | -1.24% to +1.06% |
|---|---|
| Median reaction (30-min) | 0.00% |
| Measured reactions | 593 |
Half of all Sierra Metals Inc. news events land between -1.24% and +1.06% 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 SMTS moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to SMTS's baseline. Nothing else.
Recent SMTS events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Alpayana Completes Privatization of Sierra Metals Inc. | Press release | Canada Newswire | — | — | |
| SIERRA METALS ANNOUNCES APPOINTMENT OF CHIEF FINANCIAL OFFICER | Press release | Canada Newswire | — | — |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the SMTS section they belong to.
Where else SMTS is measured.
SMTS earnings → · Analyst actions → · SEC filings →
Other Basic Materials names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| VERSUM MATERIALS INC (VSM) | 629 | -0.04% | 40% |
| MIDSTATES PETROLEUM CO INC (MPO) | 615 | 0.00% | 47% |
| Ecolab Inc. (ECL) | 590 | +0.10% | 58% |
| Endeavour Mining Corp (EDV_TSE) | 590 | +0.09% | 52% |
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 Basic Materials names, measured the same way →
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How the numbers are made.
How is Sierra Metals Inc.'s median reaction calculated?
Every labeled SMTS 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 593 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. 37% of SMTS'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 SMTS'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.