FSLY ▼ -6.6% - Fastly, Inc. $FSLY - Investor Day volatility Fastly shares fell 6.6% today amid volatility surrounding the company's investor day event. The magnitude of the decline suggests investors may have reacted negatively to guidance, strategic announcements, or forward-looking commentary presented at the event, though specific details were not available. 22-SEP-2026 12:53 PM ET