That is business for you. Seasons changes. In business, we have 4 major faces, Depression, recession, recovery and boom. Many saw it coming while many did not. Buying now is good but buying at the bear market was better.
If I recall correctly I've seen those phase as you mentioned in some kind of trading graphic however it seems that thing proved to be true although not entirely true though.
However, it's such a fresh air that the pumping which everyone have awaited finally arrive and that's certainly a business opportunity as you said.