Market
Wall Streetâs Top Chartist Warns US Tech Stocks Now At Highest Concentration Since the 2000 Bubble
YahooMay 13, 2026
Craig Johnson, Chief Market Technician at Piper Sandler, used his CNBC Morning Call Sheet appearance to flag concerns for self-directed investors riding the AI trade. Introducing Piper Sandlerâs report The Bull Market That Few Trust, Johnson said: âThe technology sector is now 41% of the investable assets here in the US. Semiconductors are 50% of ... Wall Streetâs Top Chartist Warns US Tech Stocks Now At Highest Concentration Since the 2000 Bubble