Is Fat Tuesday Really Fat? The Nasdaq Says… Yes.
Mardi Gras — literally "Fat Tuesday" — is the day of excess before Lent's fasting begins. Beads, king cake, one last blowout. It's a movable feast: it rides on Easter, so it lands on a different Tuesday every year (anywhere from early February to early March).
I couldn't resist the question. On a day named for being fat, does the market go big too?
I computed every Fat Tuesday from the Easter cycle, tagged those days on the Micro Nasdaq, and pulled the range. Small sample — one per year — so wear this loosely. But the result made me laugh, because the name fits.
Fat Tuesday runs fat
Against a baseline day of 254.4 points ($509):
- Fat Tuesday range: 417.2 points ($834) — about 64% WIDER than normal.
- Direction: 0% trend-up, 43% trend-down.
Read that first number again. The day literally named for excess is one of the widest single days on the calendar — 64% above a normal session. Every Fat Tuesday in the sample was a big-range day; the smallest still ran 185 points, most ran 300–650.
And there's a lean: not one Fat Tuesday closed as an up-trend day, while nearly half closed down-trend. So the market's party tends to be a messy one — big range, and if it picks a direction, it's more often down. Fat, and a little reckless.
The honest caveat (and why it's still fun)
This is seven days. One per year. That is not an edge, it's a curiosity — and a couple of those days landed near other big events, so some of that width isn't "Mardi Gras," it's just "a volatile Tuesday that happened to be Mardi Gras." I'm not going to hand you a "short Fat Tuesday" strategy off seven days, and you shouldn't build one.
But it's a genuinely fun result, and it's the opposite of Valentine's Day, which came in quiet and gently bullish. Two holidays, two personalities: Valentine's soft and friendly, Fat Tuesday big and rowdy. Whether that holds up over the next decade is exactly the kind of thing I'll keep checking.
The name, at least, earns its keep. Fat Tuesday is fat.
— 23HT
How this was done: every Fat Tuesday (computed from the Easter cycle) traded by MNQ from 2019 through February 2026, compared by median range and day-type against the all-days baseline. n=7 — a fun look, not a finding.