Whats it called when you buy 100 shares of stock @ 1.00 then another 100 @ .50 cents bringing the avg to .75?

now the math above might not be accurate but for example purpose what do you call when you buy 100 shares at a 1.00 then another 100 shares later at 50 cents bringing the avg spent per share down from the original price?
thanks

Twism;
Its called Dollar-Cost-Averaging.

dollar cost averaging

and this is the basis of regular investment plans.

you buy more when the price is down, buy less when up...

It's called swallowing your pride and buying more of what you lost money on cuz you know it's an even better investment cheaper than when you bought it the first time.