This suggests that even the best stock in a lousy sector will do poorly when that sector is out of favor. At the same time, any old company in a hot sector will do well.
For example, personal computers went nowhere after all of the Y2K upgrades were completed. Indeed, even Dell (DELL - Get Report) has been range-bound for the past three years. The same goes for the networking stocks -- what company is better than Cisco (CSCO - Get Report)?
On the other hand, you could have thrown a dart at oil companies such as BP (BP - Get Report), ConocoPhillips (COP - Get Report) and Exxon Mobil (XOM - Get Report) or homebuilders, including Toll Brothers (TOL - Get Report) and Pulte (PHM - Get Report), and they have been screamers in the past year.
Checking out the sector also gives you an idea of who the competitors are.The same advice about individual charts also applies to sectors -- watch those sectors near the bottom of the