Since President Trump was elected - much to the heart-crushing chagrin of the billionaire class in Silicon Valley and its epic funding of Hillary - the big 5 stocks of the Nasdaq (Alphabet, Amazon, Apple, Facebook, and Microsoft) have gained a stunning $675 billion in market cap.
This pushes them near $3 trillion and well over 10% of the entire US equity market...
For context, Bloomberg notes that is more than the total value of stocks in any single equity market worldwide except the five largest: the U.S., China, Japan, Hong Kong and the U.K.