Money Market Funds: Where to Park Cash While Building Your Freedom Portfolio

Money market funds earn you 4.5–5% on cash you're not ready to invest yet. They're the staging area for your freedom portfolio. Every dollar waiting on the sidelines should be earning something.

What Is a Money Market Fund?

A money market fund is a mutual fund that invests in short-term, high-quality debt (Treasury bills, commercial paper, certificates of deposit). The fund maintains a stable $1.00 share price and distributes interest as dividends, usually monthly.

They're offered through brokerages like Fidelity, Schwab, and Vanguard. When you sell stocks or receive dividends, the cash often sweeps automatically into a money market fund.

This is not a savings account. Money market funds are not FDIC insured. But they invest almost exclusively in U.S. government securities and high-grade short-term debt. The risk of losing principal is extremely low. In the 2008 financial crisis, only one money market fund "broke the buck" (fell below $1.00 per share), and it was an institutional fund with heavy Lehman Brothers exposure.

Current Yields

As of early 2026, money market fund yields sit between 4.2% and 5.0% depending on the fund.

Fund	Ticker	Yield	Minimum	Expense Ratio
Fidelity Government MMF	SPAXX	~4.8%	$0	0.42%
Schwab Value Advantage	SWVXX	~4.7%	$0	0.34%
Vanguard Federal MMF	VMFXX	~4.7%	$3,000	0.11%
Fidelity Treasury Only	FDLXX	~4.6%	$0	0.42%

These yields move with the Federal Reserve's target rate. When the Fed cuts rates, money market yields fall. When the Fed hikes, they rise. In the current environment, they offer competitive returns for zero effort.

Money Market Funds vs. High-Yield Savings Accounts

Both serve the same purpose: earn yield on cash. Here's how they differ.

Feature	Money Market Fund	HYSA
Typical yield	4.2–5.0%	4.0–4.5%
FDIC insured	No	Yes (up to $250K)
Tax treatment	Can be state-tax-exempt (Treasury MMFs)	Fully taxable
Access	Same-day in brokerage	1–2 day transfer to checking
Minimum	$0–$3,000	Usually $0
Where held	Brokerage account	Bank account

The yield advantage of money market funds is usually 0.3–0.8% higher than the best HYSA rates. On $100K, that's $300–$800 extra per year. Small, but it adds up.

The tax advantage matters more. Treasury-based money market funds (like FDLXX) invest exclusively in U.S. Treasury securities, which are exempt from state and local income taxes. If you live in California (13.3% state tax) or New York (8.82%), this is significant.

On a 4.6% yield with 10% state tax: HYSA nets 4.14% after state tax. Treasury MMF nets the full 4.6%. That's nearly 0.5% extra, risk-free, just by choosing the right vehicle.

For a detailed comparison of HYSA options, see our savings account guide.

When to Use Money Market Funds

Emergency fund (partial). Keep 1–2 months of expenses in a HYSA for instant access. Put the remaining 4–5 months of emergency fund in a money market fund for the higher yield.

Cash between investments. Sold some stock to rebalance? Waiting for a market dip to deploy capital? Park it in a money market fund instead of letting it sit at 0% in your settlement account.

Saving for a near-term goal. Down payment for a house, car purchase, or other planned expense within 1–2 years. The principal is stable and you're earning yield.

Bridge to freedom. If you're 1–2 years from quitting your job, building a cash buffer in money market funds gives you a runway. Twelve months of expenses earning 4.7% is better than twelve months of expenses earning 0.01% in a checking account.

When NOT to Use Money Market Funds

Long-term investing. If you won't touch the money for 5+ years, it should be in index funds or dividend stocks. Cash drag is real. Over 20 years, the difference between 4.5% (money market) and 10% (S&P 500) is enormous.

As a permanent allocation. Money market funds are a parking lot, not a destination. The goal is always to deploy capital into higher-returning assets. Don't get complacent with "safe" 4.5% yields when you could be building real wealth.

How Much Cash to Hold

The right amount of cash depends on where you are financially.

Stage	Cash Allocation	Purpose
Building emergency fund	Whatever it takes	3–6 months expenses
Accumulation phase	5–10% of portfolio	Dry powder for opportunities
Pre-freedom (1–2 years out)	12–24 months expenses	Runway buffer
Post-freedom	6–12 months expenses	Spending buffer

Once your emergency fund is set and you're in accumulation mode, keep cash minimal. Every dollar in a money market fund could be compounding at 2x the rate in equities over the long run.

Setting It Up

If you have a brokerage account at Fidelity, Schwab, or Vanguard, you likely already have access to a money market fund.

1. Check your cash sweep. In account settings, see where uninvested cash goes. Set it to a money market fund if it's defaulting to a lower-yield option.
2. Choose Treasury or government. If you pay state income tax, pick a Treasury-only fund for the tax exemption.
3. Automate transfers. Set up automatic deposits from your bank to your brokerage on payday. Cash hits the money market fund immediately and starts earning.

That's it. No research needed. No monitoring. The yield adjusts automatically with interest rates.

The Income Math

Cash Balance	At 4.7%	Monthly Income
$10,000	$470/yr	$39
$25,000	$1,175/yr	$98
$50,000	$2,350/yr	$196
$100,000	$4,700/yr	$392

Money market income alone won't replace a paycheck. It's not supposed to. It's the foundation: safe, liquid, earning more than zero. Your dividends, REITs, and growth assets do the heavy lifting.

Calculate your total passive income potential with our passive income calculator.

Next Steps

• Compare high-yield savings accounts for your FDIC-insured cash
• Learn about bonds for the next step up in fixed income
• Read the complete guide to passive income strategies
• Use our compound interest calculator to see how investing that cash grows over time