Decline depth
—
Not currently in the rolling-252-day ≥20% decline universe.
Amber List
LYELLyell Immunopharma, Inc.
6.5σ
decline sigma — volatility-normalized move (typical daily 3.66%)
Current
$16.83
Decline depth
—
Decline σ
6.5σ
TFC
2/5 bearish
Rolling 252-day high
Up day
Down day
Last 90 trading days · data from Alpaca
Since tracking began
$LYEL has been tracked since 2026-03-01. It was down 46.4% from its 52-week high then — now $16.83.
That's 27.0 percentage points deeper than the day it joined.
Decline from the 52-week high as it stood on 2026-03-02 (fixed anchor) → today. Split-adjusted, Alpaca. Observed history, not a forecast.
Structural break signals
LYEL qualifies for the Amber List 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
6.5σ
Drop from local high over the last 20 bars, expressed in units of the stock's typical daily volatility (3.66% per day).
Past the ≥6σ Amber threshold.
The structural read
What price action says about LYEL.
LYEL qualifies for the Amber List on decline sigma — the recent drop measures 6.5σ 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.
52-week range
52W low $15.49
10.9% of range
52W high $27.75
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Questions about LYEL
What people ask.
Why is LYEL on Broken Stocks?
LYEL qualifies for the Amber List on decline sigma. The recent drop measures 6.5σ 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 (3.66%).
Is LYEL a falling knife?
LYEL 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 LYEL 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 LYEL trading inside its 52-week range?
At $16.83, LYEL sits 10.9% of the way from its 52-week low ($15.49) to its 52-week high ($27.75). A reading below 25% indicates price is hugging the bottom of the range; above 75%, the top.