> For some MM funds, there's a minimum trade in & out of the fund. And
> each trade in and out might trigger a ticket charge. As an example,
> Vanguard's money-market funds are likely to be "non-NTF" meaning you pay
> a trade fee every time you buy or sell them.

Not so.

I have a Vanguard money market fund in my taxable account. When I want
to buy any other fund, it is a simple matter to "exchange" shares in
money market fund for shares in any other Vanguard fund. There is no fee
to make the exchange and the trade is accomplished quickly.

Sounds like the original poster wants to be able to park some cash
somewhere earning a decent return, yet still have it available to make
quick purchases for his tax advantaged account. As others have noted,
the discount brokers don't make this easy. But Vanguard's money market
funds all offer competitive yields and the ability to exchange into
other Vanguard funds with no transaction fee.

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