Traders are watching overnight developments in Asia and Europe, response to Apple's Asian iPhone 8 launch and layoffs at HPE.
U.S. stock futures decline on Friday, and Asian shares are rattled by the threat of another missile test from North Korea.
Markets don't always go up, which is why Jim Cramer wants you to know how to deal with major selloffs and unpredictability.
On Buffett's 'moats' and where to find them. TheStreet gives you everything you need to know, for eternity.