Are tech stocks overvalued?

Apple, Microsoft, Alphabet, Facebook, Amazon account for

⭕️20% of the S&amp;P 500
⭕️40% of the NASDAQ 100
⭕️Big % of recent market gains 

Were they undervalued before the latest surge?

Interested to hear your thoughts 👇

$AAPL $MSFT $GOOGL $FB $AMZN