Expectations for market returns should be tempered, with the speaker and Vanguard predicting a more sustainable 3-5% annual return over the next decade, rather than the recent 15-30%.
"I tend to believe that it's a good idea to temper your expectation for the market over these next few years I mean assuming we'll continue to see these 15 to 30 percent Returns on an annual basis just isn't sustainable and this is also mirrored by Vanguard whose Outlook ranges for an average of three to five percent annual returns so for the next decade"