International Business Machines Corp.

(NYSE:IBM) warning that clients paused software and mainframe spending amid "rapidly-evolving, industry-wide cybersecurity concerns" sent the stock down more than 24% on Tuesday, heading towards its worst daily performance ever.

IBM stock is crashing.

See the chart and price action here.

The same line is being read as a demand tailwind for pure‑play cybersecurity vendors, boosting Palo Alto Networks, Inc.