Yahoo and Apple also have significant exposure to China AFP/Getty ImagesAll is not well in China.Given China’s status as U.S.’s second largest trading partner after Canada, the recent meltdown of the Chinese stock market poses a serious challenge to American companies with significant interest there. As an economic powerhouse with a voracious appetite for everything from Coach handbags to iPhones, China has emerged as an important market for U.S. companies. But as the events of the past month demonstrated, all is not well in China and that could increasingly affect U.S. corporate profitability. For now, most analysts are dismissive of concerns that the instability in the stock market could trigger a broader economic crisis. Still, they are recommending investors to minimize China risk, be it buying Chinese stocks or investing in U.S. companies which rely on China for a bulk of their revenue. Top S&P 500 companies with most sales from China:CompanyTickerPct of sales from ChinaSkyworks Solutions Inc.SWKS, +6.02% 67%Yum Brands Inc.YUM, +3.26% 52%Qualcomm Inc.QCOM, +1.41% 48%Avago Technologies Ltd.AVGO, +4.14% 48%Qorvo Inc.QRVO, +2.05% 47%Micron Technology Inc.MU, +2.45% 40%Expeditors InternationalEXPD, +1.01% 32%Texas Instruments Inc.TXN, +1.87% 32%Mead Johnson Nutrition Co.MJN, +0.35% 30%Altera Corp.ALTR, +0.59% 30%FactSet Technology companies are the most vulnerable to the turmoil in China, according to data from FactSet. But fast food chain operator Yum Brands, logistics firm Expeditors International, and baby formula maker Mead Johnson Nutrition are also hugely vested in the Chinese market. And although not on the list, it’s worth noting that Yahoo Inc. YHOO, +0.82% still owns a 15% stake in Alibaba Group Holding Ltd. BABA, +1.59% while China accounts for 16% of Apple Inc.’s AAPL, +2.67% revenue. Jitters over the selloff in Chinese stocks weighed on the U.S. market with all three stock indexes lower. More from MarketWatch