This article significantly misconstrues Buffets investment style. He does invest for value. But he doesn't even think whether a stock has "bottomed in the market price". Predicting when a stock has "bottomed" is not possible as it's dependent on the whims of an irrational market.
The first half of this statement is correct and the second half is completely wrong:
"He only buys when he's sure that an asset is undervalued and is likely to have bottomed in market price."
The first half of this statement is correct and the second half is completely wrong: "He only buys when he's sure that an asset is undervalued and is likely to have bottomed in market price."