Boeing’s 737 Max 9 grounding caused a 12.4% drop in BA shares, significantly lowering its rank in the SIACharts S&P 100 Index report. This event echoes past safety issues with the 737 Max series, which have consistently undermined investor confidence. Following the 737 Max 8 crashes in 2019, Boeing’s shares lost 73.5% of their value over a year and struggled in the market until a brief recovery in 2023. This pattern highlights ongoing challenges in Boeing’s operations and investor relations.