Is pair trading a fairly effective way to be in the market without much worries of major upside or major corrections? For instance Long AAPL Short DELL If the market collapses, DELL will probably drop more and AAPL less. Trying to learn this, so any suggested reading on benefits risks, basically want to learn the ropes. Another idea, it's quite obvious AMZN is stealing business from retailers like BBY, so why not, long AMZN short BBY. Thanks for guidance.