More investors are taking a look at short-duration bond ETFs amid talk of reform measures that could take away some of the competitive advantages of money market mutual funds.

Outgoing SEC Chairwoman Mary Schapiro had fought to implement regulatory changes in the huge money fund business, which controls nearly $3 trillion in assets, after the financial crisis.

Schapiro’s replacement at the SEC, Elisse Walter, could revisit the issue of money market fund reform. [Short-Term Bond ETFs in Focus]

Schapiro over the summer backed down on money fund reform measures after she failed to garner the backing of SEC commissioners. She had urged the SEC to consider capital buffers and restrictions on investor redemptions for money market funds.

Perhaps most importantly, she proposed a floating net asset value, or NAV, for money funds, which would be a huge change. Money market funds are designed to keep a stable $1-per-share value. Some funds have “broken the buck,” although it is rare. One recent example is the Reserve Primary Fund, which broke the buck in 2008 due to losses on Lehman Brothers paper. [Will ETFs Replace Money Market Funds?]

‘Hedging their bets’

Although money market funds are yielding essentially zero in a low-rate environment, investors like the safety factor of knowing that at least they won’t lose money. However, a floating NAV for money funds would change all that.

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