This paper presents a hardware architecture for Atomic Auditability in high-frequency trading systems through the physical enforcement of a ternary execution state primitive. We demonstrate that binary commit semantics—where transactions are either committed or not committed at the hardware boundary—fundamentally cannot eliminate certain classes of race conditions, audit gaps, and irreversibility errors that arise from the temporal decoupling of execution and verification. By introducing a physically enforced third state, "Escrow" or "Null," grounded in Delay-Insensitive Ternary Logic (DITL) and NULL Convention Logic (NCL) principles, we show that entire failure modes including latency arbitrage amplification, microsecond-scale feedback loops, cascading order book instability, and "Ghost Fills" (execution-audit mismatches) can be eliminated by construction rather than mitigated through software or policy interventions. The Escrow state, mapped to the NCL Spacer token, creates a non-volatile, electrically gated hold where execution paths are physically blocked, data propagation is impossible, and state transitions require measurable physical events. This architecture guarantees that execution and audit evidence share the same physical commit boundary, making execution impossible unless audit evidence already exists. We present cycle-accurate timing models, device-level implementation requirements including hysteretic C-element design, formal verification constraints expressed in Linear Temporal Logic, and quantitative cost analysis demonstrating that while DITL introduces bounded latency, it eliminates latency variance (jitter) and removes global clock distribution costs. The dual-rail encoding tax (2 wires per bit) is justified as an acceptable trade-off for race condition elimination in high-value financial execution contexts.