The S&P 500 hasn't been this dependent on just 2 stocks since 1978 as Apple and Microsoft become havens

• The combined weighting of Apple and Microsoft in the S&P 500 has grown to about 13.3%.
• That's the most that two stocks have dominated the index since 1978, the Wall Street Journal said.
• Shares of the tech giants have surged as investor seek safety amid the bank crisis.

The combined weighting of Apple and Microsoft in the S&P 500 has hit an all-time high as investors seek the safety of the two tech giants, which both boast a market capitalization above $2 trillion.