It really doesn't matter. As oil prices come down people will consume more energy. The time to buy is when everyone hates the stock. Energy will be around for awhile yet,so the best time to invest is when everyone's pessimistic. Energy stocks could go a lot lower. Those of us of a certain age remember when crude went from $29 to $6 in a short time and bankrupted a lot of countries and individuals. So don't over-extend but buy when everyone else is selling.