ERCOT’s AGUAYO_UNIT1 is reported at -$106.68/MWh. That is not a rounding error; it is the kind of print that usually means local supply is overwhelming the outlet, or a transmission bottleneck is trapping value on the wrong side of the node. The problem here is that the material does not give a primary-source confirmation for the Aguayo interval, timestamp, or component split, so the trade starts with a caution flag.

The surrounding ERCOT tape still looks noisy enough to support the thesis. ERCOT logged 100 unplanned outage events in the last 7 days and 100 SCED shadow price events in the same window, which says the system has not been idle. On the outage side, the stack includes 34 MW offline at SAMSON3, 38 MW at WHWIND, 25 MW at HILONE, 34 MW at SANTACRU, and a 75 MW forced extension outage at AMOCOOIL. On the constraint side, 6635_G carried a positive SCED shadow price of 73.863, while EASTEX showed a maximum shadow price of 5251. Taken together, that is consistent with a grid where dispatch is fighting both resource volatility and binding interfaces. It does not prove Aguayo is the pinch point, but it makes a negative node print less surprising.

For traders, the key question is whether the -$106.68/MWh came from a local congestion component or from a broader oversupply pocket. If it was congestion-led, then same-day or next-day node spreads should stay sticky and any adjacent wind or solar nodes with similar deliverability could remain weak. If it was just a transient oversupply print, the node should mean-revert faster than the constraint stack does. Watch whether Aguayo keeps repricing against nearby settlement points, and whether the shadow-price map around that interval shows a named limit that actually explains the node behavior. If not, the print is more likely a one-off market microstructure event than a durable curtailment signal.

> A -$106 node print matters only if the constraint behind it is real and repeatable.

Not investment advice. For informational purposes only.