ORTEXORTEX News
Tracking PTGX? Get live short interest, options flow, and signals on ORTEX.Sign up free →
PT

Protagonist Therapeutics, Inc. (PTGX) short interest & options flow

NASDAQ
Latest pulse17 Aug 2026

PTGX cost to borrow spikes 143% in one week to 0.48%, signaling tightening loan availability despite short interest falling 9% over same period.

$134.44+4.42% 1d-7.21% 1w-5.99% 1mClose: 19 Oct 2026
Short interest % of float
High
Live SI on ORTEX →
Cost to borrow
Low and dropping
Live CTB on ORTEX →
Availability
Live availability on ORTEX →
Put / call ratio
Live options on ORTEX →
Market cap
$8.70B
Next earnings
2 Nov 2026
See the full picture on ORTEX →Live short interest, options flow, signals, 13F filings, and more.

Key data as of 20 Oct 2026

Latest signals on PTGX

  • Cost to Borrow

    PTGX cost to borrow spikes 143% in one week to 0.48%, signaling tightening loan availability despite short interest falling 9% over same period.

  • Options

    PTGX put-call ratio plunges to 0.48, nearly four standard deviations below its 20-day mean of 0.74, signaling extreme bullish sentiment in options markets.

PTGX news and analysis

RSS

No long-form analysis yet for PTGX. Pulse alerts and the live data picture are available on ORTEX.

Open PTGX on ORTEX →

Want the live picture for PTGX?

Short interest updated daily, real-time options flow, analyst consensus deltas, 13F positioning, ORTEX Alpha signals, and every article ORTEX publishes for PTGX — free to start on ORTEX.

Sign up for free →Open PTGX on ORTEX