"[W]hat jumps out here is language from an internal Fidelity document. The company says -- now that revenue sharing from active managers is drying up -- it needs to charge the fee to address a 'broken business model' and 'unsustainable economics.' Interestingly, this is all happening after the death of the DOL fiduciary rule, which means that the free market is causing disruption ... What happens to Fidelity in the this case will almost certainly determine just how recordkeepers charge and disclose fees."