Real time prices go negative in U.S. energy markets as well. Usually during off peak hours with a high percentage of wind generation in the zone.<p>Look at the North Zone of New York, it spent a good chunk of Sunday negative:
<a href="http:&#x2F;&#x2F;mis.nyiso.com&#x2F;public&#x2F;csv&#x2F;realtime&#x2F;20160508realtime_zone.csv" rel="nofollow">http:&#x2F;&#x2F;mis.nyiso.com&#x2F;public&#x2F;csv&#x2F;realtime&#x2F;20160508realtime_zo...</a><p>Use the LMP column(Locational Marginal Price)<p>It should be noted that most energy is purchased in the day ahead market, which I can&#x27;t recall seeing negative - although maybe in Texas (ERCOT).<p>The provider will need to buy back the energy in at the realtime price if they are not generating. But I am not sure about the market rules for negative prices.