Over the years you buy one sector that is doing good or supposed to be the next sector to do well, and next it is something else but you like what you already have so you keep it. (pursuingretirement.com)
They also act as a conservative cornerstone to your portfolio, letting you then add shares from more volatile sectors such as the high - tech industry — the next sector we're going to purchase from in Module 2. (financialtrading.com)