Group 1 - Nvidia (NVDA.US) has the highest operating efficiency among the "Big Seven" in the US stock market, with an operating profit margin of 59.86% over the past four quarters [2] - Tesla (TSLA) ranks last with a profit margin of 8.76%, attributed to protests related to CEO Elon Musk's brief political involvement and strong competition from Chinese EV manufacturer BYD [2][5] - Meta (META.US) ranks second with a 44.42% rolling 12-month operating profit margin, while Microsoft (MSFT) ranks third among tech giants [2] Group 2 - BestBrokers analyzed financial data from 1,189 companies with a market capitalization over $10 billion across 39 major industries [5] - The research highlights that Nvidia's high profit margin reflects its leadership in the AI and gaming GPU markets, emphasizing the importance of sustainable growth through cost control and strategic positioning in high-margin markets [5] - The average operating profit margins for various industries include port operations (38.5%), financial investments (32.4%), tobacco (31.2%), and railway operations (30.1%) [7] Group 3 - In the automotive sector, luxury brand Ferrari leads with an operating profit margin of 28.7%, nearly double that of Toyota's 15.4%, both significantly above the industry average of 4.8% [7] - Ferrari's limited production strategy of 13,752 vehicles in 2024 contrasts sharply with Toyota's approach of achieving strong profit margins through production efficiency and supply chain management [7] - Electric startup Rivian (RIVN.US) faces severe challenges, with an operating profit margin of -70.3% due to ongoing investments in R&D and manufacturing difficulties [7]