We had this breakneck outperformance of the US assets being solidly grooved in since the 2009: 

1. US equities were booming
2. US Treasuries (sovereign bonds) were booming
3. US corporate credit was booming
4. US Real Estate was booming
5. US Dollar was booming
6. US Venture Capital was booming

This outperformance grew increasingly in conflict with the fundamental, undeniable reality of life & business:
the inevitable mean reversion of valuations AND fundamentals. 

We will face, almost certainly, at least 5-10 years of underperformance of the US assets.

Foreign and US Asset Managers would be pulling money away from the US shores,
and would be steadily growing allocations to other countries
(from Australia to Zambia) and the likely underperformance of US assets would serve as a painful regular reminder for us all.