MWCB Test Attestation Tool

The MWCB Test Attestation tool supports all Cboe-affiliated US Equities Exchanges. Firms designated as mandatory participants of industry-wide Market-Wide Circuit Breaker (MWCB) testing, per individual notification by Cboe, must submit a MWCB test attestation form using the MWCB Test Attestation Tool within one business day following test completion.