YSK: If you want to know what's going on in a (large, public) corporation, read their annual Form 10-K report. Marketing and shareholder communication can be distorted to make things look better than they are, but the Form 10-K is legally required to have undistorted financial and risk analysis.
from /r/YouShouldKnow
YSK：如果你想知道一家（大型上市）公司发生了什么，请阅读他们的年度10-K表格报告。市场营销和股东沟通可以被扭曲，使事情看起来比实际情况要好，但10-K表格是法律要求的，有不扭曲的财务和风险分析。