Red List
ATRA
Atara Biotherapeutics, Inc.
Healthcare · Biotechnology · micro-cap ($85M)
-49.9%
from rolling 252-day high of $19.15 set 2026-01-05 · 129d ago
Current
$9.59
Decline depth
-49.9%
Decline σ
1.1σ
TFC
3/5 bearish
Rolling 252-day high Up day Down day Last 90 trading days · data from Alpaca

Structural break signals

ATRA qualifies for the Red List on decline depth.

Decline depth
-49.9%
From rolling 252-day high of $19.15, 129d ago. Past the 40% Red List threshold.
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
1.1σ
Drop from local high over the last 10 bars, expressed in units of the stock's typical daily volatility (21.7% per day).

The structural read

What price action says about ATRA.

ATRA qualifies for the Red List on decline depth — down -49.9% from its rolling 252-day high. Past the 40% threshold, the deepest tier in the taxonomy.

Cross-confirmation: also showing 3/5 bearish time frames.

Earnings on file: 2026-03-16. Tiering is unaffected by earnings dates — listings reflect price structure only.

52-week range

52W low $3.92 37.2% of range 52W high $19.14

Sector context · Healthcare

182 other Healthcare tickers are on Broken Stocks.

92 Red List
43 Amber
47 Watch
-35.8% Median decline

Worst in sector: OPRX (-76.7%). Least-bad: ANIP (-20.0%). See all Healthcare listings →

Questions about ATRA

What people ask.

Why is ATRA on Broken Stocks?

ATRA qualifies for the Red List on decline depth. It is down -49.9% from its rolling 252-day high of $19.15, set on 2026-01-05 — 129d ago.

Is ATRA a falling knife?

Not by the strict technical definition. ATRA is down -49.9% from its 52-week high, but that high was set 129d ago — more than 120 days. A falling knife is usually a recent breakdown from a fresh high, not an established multi-quarter downtrend. ATRA is still on the Red List for decline depth, but the freshness component of a falling knife is missing.

Is ATRA 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 ATRA trading inside its 52-week range?

At $9.59, ATRA sits 37.2% of the way from its 52-week low ($3.92) to its 52-week high ($19.14). A reading below 25% indicates price is hugging the bottom of the range; above 75%, the top.

How fast has ATRA been declining?

The current 49.9% decline accrued over 129d, which annualizes to roughly -141.2% per year. Annualized pace is a sanity check — a 30% decline in three months is a different signal than a 30% decline over two years.

How does ATRA compare to its sector?

There are 182 other Healthcare tickers on Broken Stocks: 92 Red, 43 Amber, 47 Watch, with 55 showing recovering structural signals. Median sector decline is -35.8% — ATRA's decline is deeper than the sector median.

Does ATRA's earnings date affect its tier?

No. Tiering is decided purely by decline depth and recency of the rolling-high date. The earnings date on file (2026-03-16) is shown for reference only — listings can move tier between scans based on closing prices, regardless of fundamentals or news events.