One of the most common mistakes in stock market investing is trying to time the market. Time the market, or “market timing,” means trying to figure out the best time to get in the market, or invest. It also means the best time to get out of the market, or sell. It’s not easy to be right on both ends. It can be unsettling to experience market volatility, so that’s why it’s important to understand the difference between savings (which are more stable) and investments (which can be more volatile). It’s the time in the market that is more important, not necessarily timing the market.
P/E ratio -- The price-to-earnings ratio is the most widely cited valuation metric, and for good reason. It's an easy way to compare similar businesses. Simply divide a company's current share price by its last 12 months' worth of earnings. You can also use the projected earnings over the next 12 months to calculate the forward P/E ratio. The key point to know is that P/E ratios are most useful when comparing businesses in the same industry -- such as comparing ExxonMobil (NYSE:XOM) and Chevron (NYSE:CVX).
The use of borrowed money “levers” or exaggerates the result of price movement. Suppose the stock moves to $200 a share and you sell it. If you had used your own money exclusively, your return would be 100% on your investment [($20,000 -$10,000)/$10,000]. If you had borrowed $5,000 to buy the stock and sold at $200 per share, your return would be 300 % [(20,000-$5,000)/$5,000] after repaying the $5,000 loan and excluding the cost of interest paid to the broker.
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.
6. Find a good investment service to subscribe to. Many of the suggestions above can now be covered by joining just one stock market service. These services now aim to pick stocks, offer trading and portfolio management software and educational services too. If things go well, then by investing in the stock market picks, the service can be paid for with profits.
Buy in thirds: Like dollar-cost averaging, “buying in thirds” helps you avoid the morale-crushing experience of bumpy results right out of the gate. Divide the amount you want to invest by three and then, as the name implies, pick three separate points to buy shares. These can be at regular intervals (e.g., monthly or quarterly) or based on performance or company events. For example, you might buy shares before a product is released and put the next third of your money into play if it’s a hit — or divert the remaining money elsewhere if it’s not.