Sigma Lithium shares surge 13.46% intraday after reporting improved Q3 results and announcing Brazil lithium mine expansion.

think> Okay, let's tackle this query. The user wants me to transform a given Chinese text into a concise news headline following specific rules. First, I need to parse the input text carefully. The company name is Sigma Lithium, and the stock moved intraday by 13.46346346%, which should be rounded to two decimal places, so 13.46%. The time period is intraday. Next, the reasons for the price movement are two points. The first is the Q3 earnings report with $28.5 million in sales and a net loss of $11.58 million, which is an improvement from the previous year. The second is the announcement of expanding lithium production in Brazil, aiming for 73,000 tons in Q1 2026, a 6.8% increase, and a new commitment to 100,000 tons of spodumene with a $51 million contract for 40,000 tons by year-end. I need to combine these points into a brief reason. The example provided uses a structure that starts with the company name, the percentage change, time period, and then the key reasons. The first reason is the earnings report showing improved sales and reduced losses. The second is the production expansion and the new contracts. I should mention both but keep it concise. Also, the user wants the headline in English, keeping the company name as is. The percentage should be 13.46% without trailing zeros. The time period is intraday. The reason should include the Q3 results and the production expansion with the contract details. I need to make sure the key figures are included: sales, net loss, the expansion numbers, and the contract value. Let me check the example again. The example mentions the subsidiary's project and the company's focus. In this case, the main points are the earnings report and the production expansion. I need to phrase it clearly without being too wordy. Maybe something like "Sigma Lithium surged 13.46% intraday after reporting Q3 sales of $28.5 million and a narrowed net loss of $11.58 million, alongside announcing expanded Brazilian lithium production capacity targeting 73,000 tons in Q1 2026 and a $51 million spodumene purchase agreement." Wait, the user's example included the company's focus in a separate paragraph. But the transformation rules say to provide a brief reason. So maybe the reason should be in one sentence, combining both the earnings and the production expansion. Let me structure it as: "after reporting Q3 sales of $28.5 million and a narrowed net loss of $11.58 million, and announcing expanded Brazilian lithium production capacity targeting 73,000 tons in Q1 2026 and a $51 million spodumene purchase agreement." I need to make sure the numbers are correct. The net loss is $11.58 million, which is an improvement (同比改善), so "narrowed" is appropriate. The production expansion is 6.8% growth, but the key number is 73,000 tons. The contract is 5100万美元 for 4万吨, which is $51 million for 40,000 tons. The user mentioned "首次承诺10万吨锂辉石承购", so the 100,000 tons is a new commitment, but the contract mentioned is 40,000. Maybe the headline should mention the 100,000-ton commitment and the $51 million for 40,000 tons. So perhaps "committing to a 100,000-ton spodumene purchase and announcing a $51 million contract for 40,000 tons by year-end." Putting it all together: "Sigma Lithium surged 13.46% intraday after reporting Q3 sales of $28.5 million and a narrowed net loss of $11.58 million, and announcing expanded Brazilian lithium production capacity targeting 73,000 tons in Q1 2026, committing to a 100,000-ton spodumene purchase, and a $51 million contract for 40,000 tons by year-end." I need to check if all key points are included and the percentage is correctly rounded. Also, the time period is intraday. The company name is correct. The example had two sentences in the reason, but the user's instruction says to provide a brief reason, so maybe one sentence is better. Let me see if the example had two sentences. The example output had two paragraphs. Wait, the example output has the first paragraph with.