To go further, this is what Warren Buffett made his first few millions off of what is considered "cigar butt" investing. These are stocks trading below their Net Current Asset Value (NCAV). That means take all of their cash, real estate, equipment... those are your net current assets. Now take a subset of those stocks, and you find some at such steep discounts that they are trading below the cash they are holding. How is that possibly rational?
To put that in perspective with a contrived example would be Apple, currently trading at $153 with a market cap of nearly $800B, $250B of that is in cash. Now imagine Apple is trading at $45 a share. That would value Apple at $235B...but if they liquidated the company, they would have more than that in the cash alone! And that is exactly the kinds of companies that folks like Ben Graham and Warren Buffett invested in, because they were so cheap, and probably not even great businesses, but had "one less puff" (hence cigar butt) in them before they closed up shop, were acquired, etc.
Now, one retort might be that these guys were investing in two of the worst markets in the history of the US economy - Ben Graham came out of the Great Depression and Warren Buffett from the bear market of 61-62. But there are still examples of this today. Seth Klarman's fund (which still exists today) has only had 3 down years and is considered to be one of the greatest investors since Buffett. These investments still exist, and it's all based on buying cheap when the market has irrationally priced them at a sale.