NEW YORK (TheStreet) -- Building a portfolio in this bull market is kind of like coaching LeBron James, All you have to do is stand up every five minutes and yell "Give LeBron the ball." Pretty soon everyone will think you are a great basketball coach.Maybe it's not quite that easy in coaching or investing. But this market continues to hit new highs and continues to break out. It is easy if you are in the right asset classes, the right sectors and the right stocks. Small-cap and mid-cap domestic stocks continue to be the best asset classes to be invested in. Here is my current relative ranking of the asset classes.
During my 20 years in the market, I've seen a lot of streaks. Up and down, and what goes up can go down a whole lot faster than it went up. Biotech, health care and homebuilding, for example, have been on a tear. These are obviously very much risk-on sectors. Here is my current ranking of the market sectors:
When they start dropping in rank however, and their stock charts start to roll over, I have an exit strategy in place. That is why I sold Apple ( AAPL) at $637. I am also always on the lookout for the next group of stocks to emerge. I have recently bagged some big winners like Regeneron ( REGN) and Aegerion ( AEGR). Just like Jordan. Just like LeBron. Just like the next big thing who is now in grade school waiting for LeBron to fade so he can take his place. This current bull market is now 50 months old. The S&P 500 has gone from $666 to over $1,600. No good thing lasts forever. Just ask Kobe Bryant. Do you or your adviser have an exit strategy? Follow @pwstreet This article was written by an independent contributor, separate from TheStreet's regular news coverage.