The product, issued and managed by State Street Global Advisors, is designed to closely track the returns of the S&P/ASX 200 Accumulation Index.
"The rating reflects a combination of very low direct and indirect costs, a highly liquid secondary market, a simple and transparent portfolio-construction approach and historical performance that has been very true to style. Additionally, [the ETF] has proven, and will likely to continue to be, a highly tax-efficient investment vehicle; in a comparative sense, it may generate superior after-tax returns for investors with anything other than a 0 per cent marginal tax rate," S&P fund analyst Rodney Lay said.