The total market capitalization of the six largest technology stocks plus Berkshire Hathaway equals $9.1 trillion, about 28% of the total capitalization of the S&P 500 ($32 trillion).

(1) Apple ($2.38 trillion) —             +75.1%

(2) Microsoft ($1.71 trillion) —    +36.40%

(3) Amazon ($1.64 trillion) —         +74.4%

(4) Alphabet ($1.29 trillion) —        +27.5%

(5) Tesla ($789 billion) —                  +643%

(6) Facebook ($783 billion) —          +24.0%

(7) Berkshire Hathaway ($547 billion)  — +1.7%

S&P 500 —     +15.7%

DJIA     —              +6.2%

Nasdaq  —        +44.3 %