Timing is everything. If you are planning to retire in 2020 and invested in a target-date fund, then your timing last year was impeccable. The Nasdaq returned 36.89 percent, and the S&P 500 32.83 percent. And every Morningstar bond fund category booked positive returns, with long-term bond funds averaging a 19.3 percent return. The Bloomberg Barclays U.S. Aggregate Bond Index returned 8.7 percent, its strongest performance since the financial crisis. So solid were last year's returns that the aggregate value of mutual fund and collective investment trust TDF assets is flirting with the $2 trillion threshold—it was $1.7 trillion at the end of 2018. Three providers account for 69 percent of the top-heavy mutual fund TDF market; the top five account for 83.2 percent. If you haven't already, take a look at the slides above, which offer a breakdown of how five providers' 2020 vintages fared last year.