TIAA or Fidelity? My answer is Fidelity.

Cornell's 403(b) lets you split contributions between TIAA and Fidelity, and the enrollment portal is neutral about it. I'm not. For the bulk of Cornell employees, I think the bulk of the money belongs on the Fidelity side. Here's the reasoning, and the places where TIAA genuinely earns a seat.

The case for Fidelity is boring, which is the point

Fidelity's menu is mostly low-cost index funds. You can own thousands of companies for a few hundredths of a percent a year, the fee is printed where you can find it, and your money moves when you say so. Nothing in that sentence is exciting. Over thirty years of contributions, it's exactly what compounding wants.

My problem with the guaranteed account

TIAA Traditional is the flagship: your balance never falls, and TIAA credits interest at a rate it declares. The pitch is safety. My issue is the price of that safety, which never appears on a statement. Traditional has no published expense ratio. Whatever TIAA earns on your money beyond what it credits you is the fee, and you can't see it.

And lately, the guarantee hasn't been buying much. A plain money market fund has paid a comparable rate, fully liquid, no strings. When cash pays about what the guarantee pays, you're trading away flexibility for something you could have had for free.

(Fair is fair: some older contracts carry a 3% guaranteed floor forever, which was a wonderful thing to hold in 2020 and could be again if rates fall hard. If you have old Traditional money, learn your contract's floor before touching a dollar of it.)

The exit rules tell you something

Under the classic contracts, a large Traditional balance doesn't leave in one transfer. It pays out in annual installments spread over roughly a decade. I'd ask one question of any investment: if it's such a good deal, why does the door only open one way?

The annuity conversation you'll eventually have

At retirement, TIAA will offer to convert your savings into a monthly check for life. Wanting a guaranteed income floor is legitimate. My objection is how the product is sold: as the natural next step rather than a purchase you should shop. Payout annuities bake their costs into the payout rate itself, so competing quotes are the only way to know whether the deal is fair. If TIAA's number wins, take it.

What I'd do with it

• New contributions: the Fidelity index menu as the core. Simple, cheap, liquid.
• Existing Traditional balances: check your contract letters (RA, GRA, SRA, GSRA) and your guaranteed floor before moving anything. Old vintages with high floors can be worth keeping, and large balances take years to exit anyway. No rash moves.
• At retirement: if you want lifetime income, get quotes from the open market alongside TIAA's offer and let the numbers decide.

Honest exceptions exist: high-floor vintages, the rare person who will genuinely sleep better with an annuity and won't shop for one, phased-retirement wrinkles. But the short version stands: for the bulk of Cornell employees, the bulk of the 403(b) is better off at Fidelity.

The fuller walkthrough of the plan (both record-keepers, the contract types, the payout rules) lives in our guide to the Cornell 403(b) and TIAA. And if the retirement date itself is coming into view, start with the guide to retirement planning in Ithaca.