CNBC's Jim Cramer reveals how retail investors can discover valuable stocks before others catch wind and drive up the stock price. The "Mad Money" host breaks down what stocks from the 2019 IPO class are worth buying.

At-home investors may be wondering how to find overlooked companies in which to buy shares at a time when a historic bull market enters another decade and concerns about valuations are present.

The way to start, according to CNBC's , is a process called a "read-through."

"So much of successful investing is about read-throughs, dissecting the less obvious pin action when a company reports earnings," the "Mad Money" host said.

To illustrate the process, Cramer took a look at two of the best read-throughs of Thursday's session.

Cramer said he has turned positive on a handful of the 2019 IPO class stocks. He endorsed them for declining to more enticing prices.

"This year's IPO market has been a real roller coaster, but now that the dust has settled and many of these newly minted stocks have come down, I've got to tell you: I like ," he said, ", and right here, right now."

In Cramer's lightning round, the "Mad Money" host gives viewers his thoughts about their stock picks at rapid speed.

: "I think it's still cheap. It's had a nice run, but I still like it very much and I think it should be bought right here."

: "I've liked it since it came public. I think it's terrific."

: "The stock is a rocket ship and it's terrific. It's at $88, it's still got a 5% yield, it goes higher."

Disclosure: Cramer's charitable trust owns shares of Abbvie.