Six blue-chip stocks aggressively backed by Warren Buffett are on sale on Wall Street as the year draws to a close, mainly due to broad economic factors and stock market fashion. That makes them worth a look,

Warren Buffett has made some rather bearish moves in Berkshire Hathaway's (NYSE: BRK.A)(NYSE: BRK.B) stock portfolio in the past few quarters. Most notably, the legendary investor disposed of significant portions of both the Apple and Bank of America investments that have performed extremely well for Berkshire.

Warren Buffet is currently showing off his portfolio in style but he has not invested a large part of his diversifications into tech stocks itself. His top-notch portfolio features three top AI stocks in the US stock market and these are his justifications of buying these stocks.