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:

  1. SPDR® Portfolio S&P 500 Growth ETF

enter image description here

  1. iShares Core S&P US Growth ETF

enter image description here

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:

  1. What were the events that caused the ETF to drop so much during that time?
  2. Why despite having the similar holding, the crash happened at different time?

2 Answers 2


That is a ETF split, just like a stock split. You own more shares traded at lower price after the split.


SPYG underwent a 1/4 stock split on 10/16/17

IUSG underwent a 1/2 stock split on 7/25/16

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .