In the professional world, one of the key concepts is diversification. Harry Markowitz is a Nobel prize winning economist and one of his major discoveries was that adding new asset classes can dramatically alter the overall risk profile of a portfolio. His finding was that a portfolio that contained very low risk assets would normally benefit from lower volatility and higher returns if a higher risk asset was added. This is due to the likely lack of correlation between high and low risk asset classes.
By understanding your risk tolerance, you can avoid those investments which are likely to make you anxious. Generally speaking, you should never own an asset which keeps you from sleeping in the night. Anxiety stimulates fear which triggers emotional responses (rather than logical responses) to the stressor. During periods of financial uncertainty, the investor who can retain a cool head and follows an analytical decision process invariably comes out ahead.

The Intelligent Investor by Ben Graham ought to be required reading for every private investor. While the innovations he brought to stock analysis have long been outdated and the red flags he used to watch out for in a company's accounts are now regulated against by the SEC, many of his insights about thinking about investment still stand. For example, his description of Mr Market is still an excellent way of understanding how a crowd moves with the daily news.
Tastyworks officers say that more than 90% of the trades placed by their customers are derivatives, so there are a lot of tools for options and futures traders. Everything is designed to help the trader evaluate volatility and the probability of profit. It’s all about making decisions and taking action. Executions are fast and the costs are low, capping commissions for opening orders for options on equities and futures at $10 per leg. As you build a position from a chart or from a volatility screener, a trade ticket is populated for you. There’s a video viewer embedded so you can keep an eye on the tastytrade network. Though a newcomer to options trading might be initially uncomfortable, those who understand the basic concepts will appreciate the content and features.
Hiring human brokers to make phone calls and sell clients on investing is costly. Because discount brokers avoid this cost, they can pass on the advantage to customers in the form of lower commissions. A simple rule in the financial world is that clients pay the brokers' expenses, so the lower the brokers' expenses, the lower the fees and commissions.

If you are an active trader who prefers making frequent, small trades, Interactive Brokers may be the best fit. There is no pre-trade fee and options commissions are $0.70 cents per contract. High volume traders can qualify for lower pricing down to $0.15 cents per contract with 100,000+ contracts per month. This brokerage also offers pricing that is attractive to active stock and ETF traders. Different pricing applies to non-US options.

Features: Now that most online brokers don't charge commissions, it's more important than ever to compare the features you get. Some online brokers have tons of research available, educational tools to help you learn how to invest, and more. These can be very valuable assets for beginning investors, so keep this in mind when comparing brokers. After all, if the cost of investing is the same (zero) at most online brokers, you might as well get as much value for your money as possible.
If you’re interested in day trading, our recommendation is to allocate a small portion of your overall portfolio to the strategy – no more than 5% or 10%, tops. That way, if you lose money — as you are likely to do, at least at first — those losses are at least capped. The rest of your portfolio should be invested in long-term, diversified investments like low-cost index funds.