That would be at least a decade of slow growth. The article is attached. As I read this, I’m struck by how fortunate we are that we didn’t go to cash back when it seemed that cash was best. I’m interpreting this article as a prediction (and you know how well those work) that index funds won’t uniformly perform optimally. (That’s investment-speak for “They might lag.”). There will still be very attractive sectors, if we have the wisdom to see them and the courage to invest in them.