@ccneill @profplum99 @ttmygh @fleckcap And Fidelity utilizes a “stepped” glide path.  
The stepped glide path seems to be what MG was describing for Vanguard as to how they rebalance these funds and why it has such a dramatic effect on $SPX levels
Am I misinterpeting this or is this site incorrect? https://t.co/l5yl4HykZA