What happened Mounting concerns of a potential financial crisis in China drove investors to reduce risk on Monday. Here's how some of the largest and most popular tech stocks fared today: Apple (NASDAQ: AAPL), down 2.1% Facebook (NASDAQ: FB), down 2.5% Amazon (NASDAQ: AMZN), down 3.1% Shopify (NYSE: SHOP), down 3.5% Nvidia (NASDAQ: NVDA), down 3.6% So what China Evergrande Group is struggling to pay its bills. The mammoth Chinese property developer has warned that it could default on its debt, which, in total, is believed to exceed a staggering $300 billion. Investors, in turn, are scared that Evergrande's seemingly imminent collapse could drive China's real estate and banking industries into a crisis -- and stall its massive economy. Many stocks fell on Monday as investors grappled with frightening news out of China. Image source: Getty Images. Should that worst-case scenario play out, U.S. companies like Apple and Nvidia that rely on China for a large portion of their raw materials and manufacturing capacity could experience supply chain disruptions. Additionally, e-commerce leaders like Amazon and Shopify, whose third-party merchants often source goods from China, could see their booming growth slow. Worse still, if China's economic slowdown and banking troubles spread to other global markets, advertisers might pull back on their marketing investments, thereby denting the profits of Facebook and other social media companies. Now what While certainly unsettling, Evergrande's troubles don't necessarily need to send the world's financial markets into a tailspin. The likelihood that a potential Evergrande collapse weakens the long-term prospects of these U.S.-based tech titans is faint, particularly if the Chinese government intervenes to reduce the chances of widespread carnage in its all-important real estate and banking industries. So, while we may see continued declines in the coming days as traders price in these risks, there's no reason for long-term investors to panic and sell their shares. 10 stocks we like better than AppleWhen our award-winning analyst team has a stock tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has tripled the market.* They just revealed what they believe are the ten best stocks for investors to buy right now... and Apple wasn't one of them! That's right -- they think these 10 stocks are even better buys. See the 10 stocks *Stock Advisor returns as of September 17, 2021 John Mackey, CEO of Whole Foods Market, an Amazon subsidiary, is a member of The Motley Fool's board of directors. Randi Zuckerberg, a former director of market development and spokeswoman for Facebook and sister to its CEO, Mark Zuckerberg, is a member of The Motley Fool's board of directors. Joe Tenebruso owns shares of Amazon and has the following options: long January 2023 $2,400 calls on Amazon. The Motley Fool owns shares of and recommends Amazon, Apple, Facebook, Nvidia, and Shopify. The Motley Fool recommends the following options: long January 2022 $1,920 calls on Amazon, long January 2023 $1,140 calls on Shopify, long March 2023 $120 calls on Apple, short January 2022 $1,940 calls on Amazon, short January 2023 $1,160 calls on Shopify, and short March 2023 $130 calls on Apple. The Motley Fool has a disclosure policy.Source