← capex_spike (all companies) · ARDX (all signals) · all methodology
capex_spike on ARDELYX, INC. (ARDX)
SIC 2834 — Pharmaceutical Preparations · CIK 1437402 · default direction: short
Definition
Fires on >50% YoY capex increase. Captures aggressive reinvestment phases — often precedes value destruction in mature industries.
Every time the signal fired on ARDX
| FY | Filing date | Event date | 1d | 5d | 20d | 60d | 252d |
|---|---|---|---|---|---|---|---|
| FY2021 | 2022-02-28 | 2022-02-28 | -5.45% | +25.97% | +37.66% | -22.73% | +279.22% |
| FY2018 | 2019-03-06 | 2019-03-06 | +13.68% | +14.04% | +4.56% | -4.21% | +130.88% |
| FY2015 | 2016-03-04 | 2016-03-04 | +4.38% | -10.39% | -14.33% | +0.11% | +50.98% |
| FY2014 | 2015-03-05 | 2015-03-05 | -2.61% | -3.42% | -19.03% | -36.82% | -43.16% |
Forward returns are stock returns from event date (next trading day after filing). Sign is raw stock direction; the trade direction is in the calibration table below.
Universe-wide calibration (this signal across all companies)
| Horizon | n events | Gross stock ret | Hit rate | Trade dir | Net PnL | Cost (bps) | r/σ net |
|---|---|---|---|---|---|---|---|
| 1d | 2,295 | +0.01% | +43.27% | short | -0.06% | 32 | -0.01 |
| 5d | 2,292 | -0.85% | +41.88% | short | +0.74% | 33 | +0.06 |
| 20d | 2,258 | -1.91% | +41.67% | short | +2.05% | 36 | +0.10 |
| 60d | 2,127 | +0.65% | +44.01% | short | -0.78% | 47 | -0.02 |
| 252d | 2,092 | +14.03% | +44.93% | short | -14.91% | 97 | -0.09 |
Net PnL is direction × stock return − round-trip execution cost (5 bps half-spread + ADV-tiered borrow). See capex_spike methodology for the full audit.