Running Commentary on the SP Movements., page-9643

Maybe quantity invested has an impact on this also,

If 1c AVZ fluctuations lead to $2000 gains, its more enticing to sell and buy back in cheaper if lucky, 17% tax savings are probably "easily" offset regardless of investment value

Fact is, buying and selling introduces more exposure and risk than holding, and in return can net greater gains, or missed opportunities that would've eventuated if things weren't touched to begin with