With that strategy, you're better protected if the price goes lower or if something should go wrong at the company.
"When you buy all at once, you're basically declaring that the stock absolutely won't go any lower," Cramer said.
For example, Zoom , a Wall Street favorite during the Covid-19 pandemic, plunged from a $588 high in October 2020 to the mid-seventies less than two years later.
But Cramer said the distinction between a damaged stock and a damaged company can be difficult to discern, and at the end of the day, "you never really know."
"Never buy a position all at once because what you think is merely a damaged stock might turn out to be a damaged company.
Persons:
CNBC's Jim Cramer, Cramer, Cisco —
Organizations:
CNBC's Charitable Trust, Microsoft, Google, Cisco
Locations:
Washington