Using dollar-cost averaging


Dollar-cost averaging is a common defensive technique in which an investor makes regular, periodic purchases of a fixed-dollar amount of one or more individual securities or mutual fund shares.

Using this strategy means you're continually investing, regardless of fluctuating price levels, and you tend to see rewards over time, not immediately. This strategy can't, of course, guarantee a profit or safeguard an investor against losses. And, you should consider your financial ability to continue purchases through periods of high price levels.

The following table shows how the technique works:
 

  Amount Invested Price Per Share # Shares Purchased
     
Jan. (initial investment) $1,000.00 $12.00 83.33
Feb. $100.00 $10.00 10.00
March $100.00 $13.00 7.69
Apr. $100.00 $9.50 10.53
May $100.00 $11.50 8.20
Totals $1,400.00 $11.20 Avg px per sh 119.75
 
*This table reflects hypothetical values.

 

The formula for determining the average dollar cost (or, the actual share price, taking all purchases into account) is:
COST (total $$ amount invested) / Number of Shares Purchased

By this formula, the average cost of the stock purchased above was: $1,400 / 119.75 = $11.69

It's easy to see the benefits of this strategy