It is also beneficial to examine the sector breakdown of your equity investments. The Instant X-Ray and Portfolio Manager tools can help you here; the more diversified your investment styles are, the more likely your stock portfolio will offer you a steadier ride through a variety of market conditions. A good basis of comparison for your portfolio is the S&P 500, which is widely used as a proxy for the performance of the U.S. stock market. Your portfolio distribution does not have to be identical to the index's, but you should watch for any positions that deviate from the norm.
If you are investing within a taxable account, you will want to be careful, because if you sell holdings from which you made a profit, you will likely face a tax consequence. However, there are several ways to position your portfolio for tax efficiency, and some tactics, such as tax-loss harvesting, can help you minimize the expense. Please see the articles below for further insight on taxable accounts.