FYI: Big exchange-traded funds get more than their fair share of attention. The largest 10% of U.S.-listed ETFs carried about 86% of all assets invested in such funds at the end of May 2019. Investors are generally proficient at seeking out better funds. The asset-weighted performance of equity and fixed-income ETFs consistently beats their equal-weighted performance, largely because the lowest-cost funds soak up a disproportionate share of assets.
Regards,
Ted
https://www.morningstar.com/articles/945672/3-hidden-gems-among-corporate-bond-etfs