Why does STW appear to be now out of favour compared to VAS or IOZ as an ETFs for the broad ASX indices?

Why does STW appear to be now out of favour compared to VAS or IOZ as an ETFs for the broad ASX indices?

A: STW from State Street (the SPDR S&P/ASX 200 Fund) charges more than the others – 0.13% pa. IOZ from iShares only charges 0.09% pa (it also tracks the S&P/ASX 200), while VAS from Vanguard, which tracks the S&P/ASX 300, charges 0.10% pa..

Liquidity is pretty much the same, as is the tracking error. My ranking:

  1. VAS (because it tracks the 300 rather than the 200)
  2. IOZ
  3. STW

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