Feel Good About Today's Market, But Don't Do Victory Dance

The Dow Jones Industrial Average finished the day up 222 points;  but about 150 of those points were due to the price action of one stock, VISA.  After all, there are only thirty stocks in that old and somewhat outdated average.  For homework, here is a list of the stocks in the Dow:
3M
American Express
AT&T
Boeing
Caterpillar
Chevron
Cisco Systems
The Coca-Cola Company
DuPont
ExxonMobil
General Electric
Goldman Sachs
The Home Depot
Intel
IBM
Johnson & Johnson
JPMorgan Chase
McDonald's
Merck & Co.
Microsoft
Nike Inc.
Pfizer
Procter & Gamble
The Travelers Companies
UnitedHealth Group
United Technologies Corporation
Verizon Communications
Visa
Walmart
The Walt Disney Company