I'm taking a look at the historical data of these 2 S&P ETF, and I find something confusing. Here are the 2 graphs:
These 2 ETFs have similar holdings, with top 10 holdings are the same. But one was crashing sometime on Oct 2017, whereas the other was sometime around July 2016.
My questions are:
- What were the events that caused the ETF to drop so much during that time?
- Why despite having the similar holding, the crash happened at different time?