diff --git a/src/agent0/hyperfuzz/system_fuzz/invariant_checks.py b/src/agent0/hyperfuzz/system_fuzz/invariant_checks.py
index d09b2a266..731c568e7 100644
--- a/src/agent0/hyperfuzz/system_fuzz/invariant_checks.py
+++ b/src/agent0/hyperfuzz/system_fuzz/invariant_checks.py
@@ -228,21 +228,29 @@ def _check_price_spike(interface: HyperdriveReadInterface, pool_state: PoolState
         )
 
     # The checkpoint weighted spot price is updated every checkpoint and every trade.
-    previous_weighted_spot_apr = interface.calc_rate_given_fixed_price(
+    previous_weighted_spot_rate = interface.calc_rate_given_fixed_price(
         previous_pool_state.checkpoint.weighted_spot_price,
-        FixedPoint(previous_pool_state.pool_config.position_duration),
+        FixedPoint(scaled_value=previous_pool_state.pool_config.position_duration),
     )
     current_spot_price = interface.calc_spot_price(pool_state)
+    current_spot_rate = interface.calc_rate_given_fixed_price(
+        current_spot_price,
+        FixedPoint(scaled_value=previous_pool_state.pool_config.position_duration),
+    )
 
-    if abs(current_spot_price - previous_weighted_spot_apr) >= delta_rate_epsilon:
+    if abs(current_spot_rate - previous_weighted_spot_rate) >= delta_rate_epsilon:
+        exception_data["invariance_check:current_spot_rate"] = current_spot_rate
+        exception_data["invariance_check:previous_weighted_spot_rate"] = previous_weighted_spot_rate
         exception_data["invariance_check:current_spot_price"] = current_spot_price
-        exception_data["invariance_check:previous_weighted_spot_apr"] = previous_weighted_spot_apr
+        exception_data["invariance_check:previous_weighted_spot_price"] = (
+            previous_pool_state.checkpoint.weighted_spot_price
+        )
         failed = True
         exception_message = (
             "Large trade has caused the a rate circuit breaker to trip. "
-            f"{current_spot_price=}, {previous_weighted_spot_apr=}. "
+            f"{current_spot_rate=}, {previous_weighted_spot_rate=}. "
             "Difference: "
-            f"{current_spot_price- previous_weighted_spot_apr}."
+            f"{current_spot_rate- previous_weighted_spot_rate}."
         )
         log_level = logging.WARNING