I've had a few that never did a damn thing until the day AFTER I dumped them. Then they hit all times highs and everyone but me is happy about it. Typical
Some days you feel like the markets are targeting your account to get you to sell. Can't imagine what the guys that have huge amounts invested go through on the bad days.
One thing is for sure..."legacy" type brands (UPS, FedEx, PG, etc) are struggling compared to non-tech. Although, I wouldn't be shocked to see some of these tech belly-up. Amazon, google, apple, etc seem to be solid on the long run. But, this ain't financial advise!!!