A: Thanks for the question.

There is no right or wrong answer to this.

That said, it would probably be considered to be rather unusual behavior to put a stop loss on an investment in an ETF that tracks a broad based index which relatively, is not that volatile (for example, an ETF that tracks the S&P/ASX 200 will be a lot less volatile that most individual company shares).

If the ETF tracked a volatile commodity, index or is enhanced, then a stop loss could make some sense.