Rule #1 1, there is no rule. A sector in a slump will take down the best. Eventually, the sector will rotate back into favor if the economy doesn't sour more. There is always a correction/recession coming followed by a bull, and this one is getting long in the tooth. Maybe try to sell a stock if it gets to 7-10% loss from some price. It may save you more money and you can always get back in. Unlike mutual funds, buying on the way down is not as "safe". Funds generally return, stocks don't have to.
Ever?! That would be wrong. Semi's have been in an almost full year bear, but to say this about a very good company, is just wrong. It's a cyclical industry, look that up.
got tired of going down, then I sell and boom it goes up. Now it will probably go back to 100
It has to be given the slowdown. Like cheetah, I think SWKS will trade sideways to down the fall, and I got out last week to preserve my gains.