CNBC's Jim Cramer said one of the keys to having a successful stock portfolio is to always do the research.
To Cramer, "buy and homework" holds a lot more weight than "buy and hold," which can sometimes blow up in investors' faces.
In addition to research, Cramer stressed that investors make sure their portfolio is diverse.
If your portfolio is diverse, it's less likely you'll get wiped out if one sector starts to struggle, he said.
"Remember, if you can keep your losses to a minimum and let your gains run, you'll almost always come out ahead."
Persons:
CNBC's Jim Cramer, Cramer, Goldman Sachs, you'll
Organizations:
Goldman