FYI: It was a decade ago that Lehman Brothers collapsed, sending markets into tailspin and causing investors to wonder if their portfolios would ever recover. While everyone knew that things would change post-crisis, no one could have predicted then that, over the next 10 years, many investors would sell off their mutual funds and buy billions of passive, index-hugging investments.
Indeed, one of the biggest stories to come out of the crisis is the rise in exchange-traded funds. While ETFs first arrived in 1993, they didn't gain in popularity until after the recession. In 2008, U.S. investors had $531 billion in ETFs; that's jumped to more than $3.4 trillion today, according to Statistica. While there are still more assets in mutual funds – $18.75 trillion at the end of 2017 – ETFs continue to capture a bigger share of the market every year.
Regards,
Ted
https://www.cnbc.com/2018/09/14/the-trillion-dollar-etf-boom-triggered-by-the-financial-crisis.html?__source=yahoo|finance|headline|story|&par=yahoo&yptr=yahoo