# Half a million dollars just landed. Now what?

> The math favors lump-sum investing, but your nerves might prefer spreading it out over a year. Here's how to decide and where to put it.
- Title: Half a million dollars just landed. Now what? · 24/7 Wall St.
- Summary: The math favors lump-sum investing, but your nerves might prefer spreading it out over a year. Here's how to decide and where to put it. Lump-sum investing…
- Keywords: rollover ira, lump sum investing, dollar cost averaging, etf allocation, spym, vxus, bnd, usfr, portfolio strategy, retirement investing, risk management, Half
- Source: 24/7 Wall St. — https://247wallst.com/investing/etf/2026/09/18/your-500k-rollover-landed-invest-it-all-today-or-spread-it-over-a-year-the-math-says-one-thing-and-your-gut-says-the-other-these-4-etfs-are-where-it-goes
- Author: Ryne Mauck
- Published: 2026-09-18T22:05:02+00:00
- Read time: 1 min
- Topics: rollover ira, lump sum investing, dollar cost averaging, etf allocation, spym, vxus, bnd, usfr, portfolio strategy, retirement investing, risk management
## Half a million just landed
You have a $500,000 rollover sitting in cash. Deploy it all at once or spread it over 12 months? The math and your gut point in opposite directions.
## The math says go all in
Vanguard research shows lump-sum investing wins about two-thirds of the time because markets rise more often than they fall. Cash on the sidelines earns less than a diversified portfolio.

> lump sum wins about two-thirds of the time
## But regret is a real risk
If stocks drop 15% next month after you invest all $500K, you'll replay that decision for years. Spreading purchases over 12 months caps damage from any single bad entry point.

> Regret is a real portfolio risk.
## SPYM: your US engine
SPYM tracks the S&P 500 with one of the cheapest expense ratios available. It holds $153.9 billion in assets and returned 16.94% over the past year.
## VXUS: don't ignore the world
VXUS covers developed Europe, Japan, and emerging markets across thousands of stocks with a 0.05% expense ratio. It's up 15.33% year-to-date, outpacing US markets in 2026.
## BND: bonds when stocks tank
BND holds roughly 10,000 investment-grade US bonds with a 0.04% expense ratio and monthly distributions. It mutes equity drawdowns and lets you rebalance instead of panic-selling.
## USFR: park your waiting cash
If you spread purchases over 12 months, USFR holds floating-rate Treasury notes that reset weekly. It charges 0.15%, pays monthly, and returned 4.09% last year with almost no price volatility.
## Pick the plan you'll stick with
Two-thirds is just a probability. If stocks fall sharply after your lump-sum click, the math won't comfort you at 2 a.m. Choose whichever approach keeps you invested for 20 years.

> Pick the one that keeps you invested for the next 20 years
## Key takeaway

Lump-sum investing wins about two-thirds of the time mathematically, but dollar-cost averaging lets you sleep at night. Pick whichever approach keeps you invested for 20 years.