Apple (AAPL), Amazon (AMZN) and Nvidia (NVDA) made news heading into the end of this holiday shortened trading week. Here are the headlines and our take on each. AAPL YTD mountain Apple (AAPL) year-to-date performance The news: Apple smartphone sales in China reportedly lagged those of Hauwei and Xiaomi during the country's recent Singles Day shopping event. The number of iPhone units sold fell 4% from last year during the roughly two-week sales period from Oct. 30 to Nov. 12, Reuters reported Thursday, citing data from Counterpoint Research. By comparison, Huawei and Xiaomi posted sales growth of 66% and 28%,…