Diversification allows you to recover from the loss of your total investment (20% of your portfolio) by gains of 10% in the two best companies (25% x 40%) and 4% in the remaining two companies (10% x 40%). Even though your overall portfolio value dropped by 6% (20% loss minus 14% gain), it is considerably better than having been invested solely in company E.
Finally, trading platforms may have specific requirements to qualify for their use. For example, day trading platforms may require that traders have at least $25,000 in equity in their accounts and be approved for margin trading, while options platforms may require approval to trade various types of options before being able to use the trading platform.
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As you near retirement, a full-service brokerage firm may make more sense because they can handle the complex "stuff" like managing your wealth in a tax-efficient way, or setting up a trust to pass wealth on to the next generation, and so on. At this point, it may be advantageous to pay 0.50%-1% of your assets in fees each year for advice and access to a certified public accountant who can help you with the nitty-gritty details that are more important as you start making withdrawals (rather than contributions) from your retirement accounts.
If you’re an active trader looking to try your hand at beating the market, you probably have a good idea of what you want in a brokerage: low costs, premium research, innovative strategy tools and a comprehensive trading platform. Below, we’ve selected the best online brokers in a variety of categories so you can choose one based on your personal priorities.