Raters expand their services, including fund evaluation, raising possible conflicts of interest.
A 'reserve' feature lets market makers hide how many shares they want to place on the market.
The ECNs says the Nasdaq's SuperMontage amounts to a monopoly.
GAO report recommends mutual funds give investors dollar-and-cents figures.
The proposal would combine mandatory electronic registration for investment advisers with greatly expanded disclosure requirements.
The SEC wants advisers to lay out their voting habits on behalf of investors.
The SEC has sanctioned trials of a pricing system for block trades. But consumer advocates raise red flags.
But the question remains whether excessive fees can be successfully challenged.