Sigma Lithium Corporation (SGML)
SGML moved a median of +0.09% 30 minutes after news, and -0.41% by the close. How SGML actually reacts to news — the realized, point-in-time move the market made, measured across 355 labeled events over the last three years with zero look-ahead.
SGML’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | -0.01% | 46% | 355 |
| 30-min | +0.09% | 52% | 355 |
| 60-min | 0.00% | 50% | 355 |
| to close | -0.41% | 45% | 355 |
| Middle 50% of SGML reactions | -1.23% to +1.58% |
|---|---|
| Median reaction (30-min) | +0.09% |
| Measured reactions | 355 |
Half of all Sigma Lithium Corporation news events land between -1.23% and +1.58% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How SGML reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 17 | +1.52% | 82% | +4.98% |
| Analyst downgrades | 16 | +1.02% | 63% | -2.89% |
| Rating reiterations | 15 | +0.48% | 80% | -0.96% |
Last 3 years, pulled 2026-09-21. Reaction = percent move vs. the price at the news timestamp. Counts and medians only. The same measurement runs across every name in the dataset. 3 further classes were observed with fewer than 10 measured events and are not published. See how SGML ranks against every other measured name →
That’s how SGML usually reacts — get an email when it moves on news →Email me when SGML moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to SGML's baseline. Nothing else.
Recent SGML events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 6-K Sigma Lithium Corp For: Oct 06 | SEC filing · Form 6-K | SEC EDGAR | -2.71% | -4.46% | |
| Form 6-K Sigma Lithium Corp For: Oct 01 | SEC filing · Form 6-K | SEC EDGAR | -0.47% | -1.83% | |
| Form 6-K Sigma Lithium Corp For: Sep 28 | SEC filing · Form 6-K | SEC EDGAR | -1.72% | +2.26% | |
| Form SD Sigma Lithium Corp | SEC filing · Form SD | SEC EDGAR | -1.21% | +0.94% | |
| Form 6-K Sigma Lithium Corp For: Sep 21 | SEC filing · Form 6-K | SEC EDGAR | -2.34% | +1.24% | |
| Form 6-K Sigma Lithium Corp For: Sep 16 | SEC filing · Form 6-K | SEC EDGAR | +0.43% | -4.41% | |
| Form 6-K Sigma Lithium Corp For: Sep 08 | SEC filing · Form 6-K | SEC EDGAR | +1.45% | -2.16% | |
| Form 6-K Sigma Lithium Corp For: Sep 04 | SEC filing · Form 6-K | SEC EDGAR | +2.52% | +2.23% | |
| Form 6-K Sigma Lithium Corp For: Aug 21 | SEC filing · Form 6-K | SEC EDGAR | +1.14% | -0.33% | |
| Form 6-K Sigma Lithium Corp For: Jun 30 | SEC filing · Form 6-K | SEC EDGAR | +2.08% | +9.10% | |
| Form 6-K Sigma Lithium Corp For: Aug 11 | SEC filing · Form 6-K | SEC EDGAR | -0.99% | -2.31% | |
| Form 6-K Sigma Lithium Corp For: Aug 05 | SEC filing · Form 6-K | SEC EDGAR | -0.28% | +0.38% | |
| Form 6-K Sigma Lithium Corp For: Jul 22 | SEC filing · Form 6-K | SEC EDGAR | +0.29% | -4.57% | |
| Form 6-K Sigma Lithium Corp For: Jul 15 | SEC filing · Form 6-K | SEC EDGAR | -2.25% | -7.21% | |
| Form 6-K Sigma Lithium Corp For: Jul 09 | SEC filing · Form 6-K | SEC EDGAR | +1.83% | -0.83% | |
| Form 6-K Sigma Lithium Corp For: Jun 09 | SEC filing · Form 6-K | SEC EDGAR | -2.54% | -1.53% | |
| Bronstein, Gewirtz & Grossman, LLC Is Investigating Sigma Lithium Corporation (SGML) And Encourages Shareholders to Connect | Press release | ACCESS Newswire | -0.63% | -4.79% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against Sigma Lithium Corporation (SGML) And Encourages Shareholders to Reach Out | Press release | ACCESS Newswire | +0.30% | -0.47% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against Sigma Lithium Corporation (SGML) and Encourages Shareholders to Learn More About the Investigation | Press release | ACCESS Newswire | -0.33% | -0.98% | |
| Form 6-K Sigma Lithium Corp For: Jun 02 | SEC filing · Form 6-K | SEC EDGAR | -3.00% | -5.25% | |
| Form 6-K Sigma Lithium Corp For: Jun 02 | SEC filing · Form 6-K | SEC EDGAR | +0.18% | -0.84% | |
| Sigma Lithium Corporation (SGML) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Shareholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | -2.01% | -0.61% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Sigma Lithium Corporation (SGML) Stockholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | +0.38% | +1.89% | |
| Bronstein, Gewirtz & Grossman, LLC Is Investigating Sigma Lithium Corporation (SGML) And Encourages Stockholders to Connect | Press release | ACCESS Newswire | +0.20% | -0.33% | |
| Sigma Lithium Corporation (SGML) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Stockholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | -1.28% | +0.33% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against Sigma Lithium Corporation (SGML) and Encourages Stockholders to Learn More About the Investigation | Press release | ACCESS Newswire | -1.28% | +0.33% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Sigma Lithium Corporation (SGML) Investors to Inquire about Securities Investigation | Press release | ACCESS Newswire | +0.14% | +0.41% | |
| Form 6-K Sigma Lithium Corp For: May 18 | SEC filing · Form 6-K | SEC EDGAR | -4.25% | +2.61% | |
| Form 6-K Sigma Lithium Corp For: Mar 31 | SEC filing · Form 6-K | SEC EDGAR | +2.16% | -1.87% | |
| Form 6-K Sigma Lithium Corp For: May 12 | SEC filing · Form 6-K | SEC EDGAR | -0.08% | +6.23% | |
| Form 6-K Sigma Lithium Corp For: May 05 | SEC filing · Form 6-K | SEC EDGAR | +0.31% | +0.58% | |
| Form 6-K Sigma Lithium Corp For: Apr 02 | SEC filing · Form 6-K | SEC EDGAR | +0.81% | +15.89% | |
| Form 40-F Sigma Lithium Corp For: Dec 31 | SEC filing · Form 40-F | SEC EDGAR | +2.38% | +6.93% | |
| Form 6-K Sigma Lithium Corp For: Mar 30 | SEC filing · Form 6-K | SEC EDGAR | +9.32% | -8.03% | |
| Form 6-K Sigma Lithium Corp For: Mar 20 | SEC filing · Form 6-K | SEC EDGAR | +0.61% | -8.17% | |
| Form 6-K Sigma Lithium Corp For: Mar 04 | SEC filing · Form 6-K | SEC EDGAR | -0.88% | -1.36% | |
| Form 6-K Sigma Lithium Corp For: Feb 23 | SEC filing · Form 6-K | SEC EDGAR | -0.44% | -0.16% | |
| Form 6-K Sigma Lithium Corp For: Feb 13 | SEC filing · Form 6-K | SEC EDGAR | -1.83% | -0.22% | |
| Miners Win as China's Export Ban Triggers 54-Nation Pact Reshaping Critical Minerals | Press release | PR Newswire | -1.10% | -0.65% | |
| Form 6-K Sigma Lithium Corp For: Feb 04 | SEC filing · Form 6-K | SEC EDGAR | +6.29% | +3.19% | |
| Form 6-K Sigma Lithium Corp For: Feb 02 | SEC filing · Form 6-K | SEC EDGAR | -0.35% | -5.56% | |
| Form 6-K Sigma Lithium Corp For: Jan 23 | SEC filing · Form 6-K | SEC EDGAR | +1.97% | +1.66% | |
| Form 6-K Sigma Lithium Corp For: Jan 13 | SEC filing · Form 6-K | SEC EDGAR | -1.82% | -4.01% | |
| Form 6-K Sigma Lithium Corp For: Dec 31 | SEC filing · Form 6-K | SEC EDGAR | +2.03% | +1.76% | |
| Form 6-K Sigma Lithium Corp For: Sep 30 | SEC filing · Form 6-K | SEC EDGAR | -0.27% | +7.26% | |
| Form 6-K Sigma Lithium Corp For: Oct 17 | SEC filing · Form 6-K | SEC EDGAR | -0.32% | -0.56% | |
| SIGMA LITHIUM ADDED TO MORGAN STANLEY NATIONAL SECURITY INDEX | Press release | PR Newswire | +0.64% | -0.80% | |
| Form 6-K Sigma Lithium Corp For: Oct 06 | SEC filing · Form 6-K | SEC EDGAR | -1.26% | -0.92% | |
| SIGMA LITHIUM RECOGNIZED FOR SUSTAINABILITY EXCELLENCE BY ITAUSA/ARAPYAU FOUNDATIONS; UPGRADES MINING OPERATIONS TARGETING HIGHER EFFICIENCY | Press release | PR Newswire | -2.82% | -3.07% | |
| Form 6-K Sigma Lithium Corp For: Oct 02 | SEC filing · Form 6-K | SEC EDGAR | -0.74% | +0.22% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the SGML section they belong to.
Where else SGML is measured.
SGML earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is Sigma Lithium Corporation's median reaction calculated?
Every labeled SGML 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 355 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. 52% of SGML'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 SGML'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.