Banter and General Comments, page-9847

If you go back to the start of this year, an ASX 300 index fund would have held just 0.06% of its value in GXY. Even if it lent all of it out and received special rate like ~8% p.a, you can do the math so show this makes a very small contribution to the portfolio. The weight is now only about 0.024%, so the contribution is now much smaller again, so yes - a small contribution to an index fund's return. However, since index funds compete primarily on price, any small tailwind to fund performance is beneficial.