Investors have been worried about the condition of the economy for a while now, and Thursday's stock market action didn't suggest that anyone feels much more confident about what 2023 will bring. Two of the biggest decliners on the day were Boston Beer (NYSE: SAM) and Shopify (NYSE: SHOP). Below, you'll learn more about what happened to both businesses and why investors don't seem as confident about their prospects for 2023 and beyond as they did before the companies issued their reports.