The total market capitalization of the six largest technology stocks plus Berkshire Hathaway equals $8.8 trillion, about 28% of the total capitalization of the S&P 500 ($31 trillion).

(1) Apple ($2.22 trillion) —             +62.7%

(2) Microsoft ($1.75 trillion) —      +38.0%

(3) Amazon ($1.60 trillion) —         +72.6%

(4) Alphabet ($1.25 trillion) —        +25.5%

(5) Tesla ($752 billion) —                  +583%

(6) Facebook ($737 billion) —          +15.7%

(7) Berkshire Hathaway ($537 billion)  — +2.3%

S&P 500 —     +13.5%

DJIA     —              -2.0%

Nasdaq  —        +40.9 %