Decline depth
—
Not currently in the rolling-252-day ≥20% decline universe.
WatchRecovering
MLMMartin Marietta Materials
4.8σ
decline sigma — volatility-normalized move (typical daily 1.95%)
Current
$575.14
Decline depth
—
Decline σ
4.8σ
TFC
2/5 bearish
Rolling 252-day high
Up day
Down day
Last 90 trading days · data from Alpaca
Since it joined the list
$MLM landed on the list 2026-03-18, down 20.1% from its 52-week high that day — now $575.14.
It has clawed back 6.8 percentage points off that level. It bottomed 25.1% below that high along the way.
Decline from the 52-week high as it stood on 2026-03-18 (fixed anchor) → today. Split-adjusted, Alpaca. Observed history, not a forecast.
Structural break signals
MLM qualifies for the Watch on decline sigma.
Time-frame continuity
2/5 bearish
Latest bar across daily/weekly/monthly/quarterly/yearly time frames. A bar counts as bearish when it's a 2-Down or a red 3.
Decline sigma
4.8σ
Drop from local high over the last 20 bars, expressed in units of the stock's typical daily volatility (1.95% per day).
Past the ≥4σ Watch threshold.
The structural read
What price action says about MLM.
MLM qualifies for the Watch on decline sigma — the recent drop measures 4.8σ over a 20-bar window. Sigma scales the move by the stock's own typical daily volatility, so a small percentage drop in a normally-quiet name can land here when the bigger players miss it on a pure-percent threshold.
Alongside that decline, our proprietary engine has flagged a confirmed bullish structural signal on one or more time frames — moderate or strong time-frame-continuity (TFC) alignment — so the ticker also carries a Recovering badge. The two readings coexist: the tier tells you how deep the damage is, the Recovering badge tells you whether momentum may be turning. Recovering is not a buy signal; it's a structural read.
Broken Stocks stops here — it flags the structure, it doesn't build the upside case. Working out whether MLM's turn is investable is what our sister tool does: ConvictionEdge — triple-engine conviction research on names showing a recovery signal.
Upstream TFC read: moderate alignment, current phase daily. Last bar types — daily 3 (green), weekly 2U (green), monthly 2D (red).
52-week range
52W low $525.38
33.8% of range
52W high $672.71
Related — same sector
Closest decliners to MLM
Questions about MLM
What people ask.
Why is MLM on Broken Stocks?
MLM qualifies for the Watch on decline sigma. The recent drop measures 4.8σ over a 20-bar window — large enough that even a small percentage drop is structurally significant given the stock's typical day-to-day volatility (1.95%). It additionally carries a Recovering badge — see below.
What does the Recovering badge mean for MLM?
Recovering means our proprietary engine has flagged a confirmed bullish structural signal on one or more time frames (moderate or strong time-frame continuity). It coexists with the decline tier — MLM is still Watch because the rolling-252-day decline hasn't healed, but a bullish setup has formed inside that decline. The two readings answer different questions: the tier tells you how deep the damage is; the Recovering badge tells you whether momentum may be turning. It's not a buy recommendation.
Is MLM a falling knife?
MLM is on Broken Stocks for time-frame continuity or decline-sigma reasons rather than headline depth, so the falling-knife label doesn't cleanly apply. The phrase usually requires a meaningful percentage drop from a fresh high. See the structural break signals above for the axis that actually triggered the listing.
Is MLM a buy?
Broken Stocks does not issue buy or sell recommendations. The list is a rules-based technical warning system. It tracks structural decline depth and recency — not company quality, management, fundamentals, or news. Always do your own research and consult a licensed advisor.
Where is MLM trading inside its 52-week range?
At $575.14, MLM sits 33.8% of the way from its 52-week low ($525.38) to its 52-week high ($672.71). A reading below 25% indicates price is hugging the bottom of the range; above 75%, the top.