In a Fluctuating Market
When prices rise, a
monthly investment buys fewer units of a given fund. When prices fall, your
monthly contribution buys more units.
Assuming a lump sum
payment of $1,000 and regular monthly investments of $100:
Total units purchased
365
Ending unit
price $ 10.00
Total value of units
at the end of the year
$3,650.00
(365 units @ $10 each)
Total cost of units
$2,100.00
($1,000
+ 11 $100 investments)
Gain on investment
$1,550.00
Average unit price
paid $ 5.75
($2,100
÷ by 365 units)
Even though the number
of units you bought each month went up or down, depending on the
market, the ending unit price of $10 is significantly higher than the
$5.75 you
paid per unit on average.
In a Rising Market
When prices rise
steadily over a period of time, your monthly investment buys fewer units of
a given fund.
Assuming a lump sum
payment of $1,000 and regular monthly investments of $100:
Total units purchased
334
Ending unit price
$ 10.00
Total value of units
at the end of the year
$3,340.00
(334 units @ $10 each)
Total cost of
units $2,100.00
($1,000
+ 11 $100 investments)
Gain on
investment $1,240.00
Average unit price paid
$ 6.29
($2,100
÷ by 334 units)
By investing a regular
amount each month, you can buy more units when the price is down, making
your average unit price $6.29. If you had waited until the end of this
period to make your investment in one lump sum, you would have paid $10
per
unit.