Sudden 8-K spikes. Reg FD blasts. Burst patterns of "other material events." Tickers whose recent filing pace looks more like a PR campaign than normal corporate activity — ranked 0-100.
+5 per 8-K item 7.01 (Reg FD disclosure — selective info release vehicle)+4 per 8-K item 8.01 (other material events — catch-all PR vehicle)+6 per 6-K (foreign issuer interim — often news-driven)+3 per DEFA14A (additional proxy soliciting — outreach activity)+15 spike bonus when 8-K count in last 30d > 2x rate of prior 150d (cadence acceleration)