Decline depth
—
Not currently in the rolling-252-day ≥20% decline universe.
Watch
SEPNSepterna, Inc.
3.3σ
decline sigma — volatility-normalized move (typical daily 6.35%)
Current
$40.79
Decline depth
—
Decline σ
3.3σ
TFC
3/5 bearish
Rolling 252-day high
Up day
Down day
Last 90 trading days · data from Alpaca
Since it joined the list
$SEPN landed on the list 2026-03-25, down 25.8% from its 52-week high that day — now $40.79.
It has clawed back 48.4 percentage points off that level. It bottomed 29.2% below that high along the way.
Decline from the 52-week high as it stood on 2026-03-25 (fixed anchor) → today. Split-adjusted, Alpaca. Observed history, not a forecast.
Structural break signals
SEPN qualifies for the Watch on decline sigma.
Time-frame continuity
3/5 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.
Past the 3/5 Watch threshold.
Decline sigma
3.3σ
Drop from local high over the last 10 bars, expressed in units of the stock's typical daily volatility (6.35% per day).
The structural read
What price action says about SEPN.
SEPN qualifies for the Watch on decline sigma — the recent drop measures 3.3σ over a 10-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.
Cross-confirmation: also showing 3/5 bearish time frames.
Upstream TFC read: weak alignment, current phase monthly. Last bar types — daily 2D (red), weekly 1 (red), monthly 2U (green).
Questions about SEPN
What people ask.
Why is SEPN on Broken Stocks?
SEPN qualifies for the Watch on decline sigma. The recent drop measures 3.3σ over a 10-bar window — large enough that even a small percentage drop is structurally significant given the stock's typical day-to-day volatility (6.35%).
Is SEPN a falling knife?
SEPN 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 SEPN 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 SEPN trading inside its 52-week range?
At $40.79, SEPN sits 57.1% of the way from its 52-week low ($27.07) to its 52-week high ($51.10). A reading below 25% indicates price is hugging the bottom of the range; above 75%, the top.