Halo, short for heavy assets, low obsolescence, has emerged as a major Wall Street theme in recent weeks. Investors are rotating from tech stocks to companies with real physical assets amid fears over artificial intelligence, geopolitical tensions and rising prices of resources and infrastructure. Here’s what you need to know about how the strategy gained popularity and why it matters to China. What is Halo? The term was coined last month by Josh Brown, CEO of Ritholtz Wealth Management, to...