Dollar-Cost Averaging (DCA)
An investing method of buying a fixed amount steadily over time instead of all at once, which smooths out the swings in your average purchase price.
No fixed formula — invest the same amount in the same asset every month (or week), consistently.
In stretches where the price swings up and down, the effect of lowering your average cost shows up clearly.
In plain terms
If you put a lump sum in all at once, buying on a day when the price happened to be high can be unsettling. Instead, if you steadily put in $100 every month, you buy more when prices are low and less when they are high, so your average price levels out naturally.
It is a way of putting time on your side rather than straining to guess "when is the bottom." With less need to agonize over timing, it is easier to stay invested comfortably for a long time.
What it tells you
Unlike buying all at once (lump-sum investing), it breaks your purchases into small pieces, reducing the risk of putting everything in on a day when the price is high.
By turning consistency into a rule, it helps reduce emotional mistakes such as selling in fear when the market drops sharply or chasing the price when it spikes.
Formula
No fixed formula — invest the same amount in the same asset every month (or week), consistently. (You automatically buy more shares when the price is low and fewer when it is high, which levels out your average cost)
What high or low means
In stretches where the price swings up and down, the effect of lowering your average cost shows up clearly.
Conversely, if the market only rises steadily over a long stretch, putting the money in early all at once may have worked out better. The purpose is managing risk and emotions, not maximizing returns.
DCA is not a "never lose" method. If you keep putting money into an asset that only keeps falling, the losses pile up too. What you buy comes first.
It's easy to confuse this with averaging down (buying more of a position already at a loss to lower your average price). Dollar-cost averaging means buying steadily according to a rule set in advance, while averaging down means buying more in reaction to a loss.
Frequent purchases increase fees. The more times you buy, the more the difference in fees shows up in the outcome.
Metrics to read alongside
See it in real stocks
Search US stocks on Stocklore to see SEC-filing-based financial metrics alongside the sector benchmark.
This explanation is for information and reference only and is not a recommendation to buy or sell any security. Investment decisions and their consequences are your own.