Wall Street’s version of Black Friday is playing out quietly in the S&P 500, where a handful of big-name companies are now trading at bargain-basement prices based on their forward earnings, and some have upside potential as high as 50%.

How To Look For Bargain Hunting On Stocks?

Forward price-to-earnings (P/E) ratios are one of the simplest tools investors use to spot undervalued stocks. It's the current share price divided by projected earnings over the next 12 months.

The lower the ratio, the cheaper the stock looks on paper.

More often than not, stocks with low forward P/E ratios also tend to show greater upside potential, measured by the gap between their current price and analysts’ 12-month price targets.

Of course, a low P/E isn't always a green light, companies can be cheap for a reason.

A low P/E ratio can result from a recent sharp drop in the stock price, signaling a severe drawdown, or it may reflect analysts underestimating the company's future earnings potential relative to its current valuation.

In both scenarios, it serves as a useful barometer of valuation, but not a foolproof signal to buy. There's no guarantee that a low P/E stock will rebound, in fact, it could fall even further.

But when earnings are stable and the long-term story is still intact, this metric often highlights names the market may be overlooking.