Can HEAT and COOL mix together?

This is probably why I don’t try financial humour too often on this site, but I couldn’t help but spot the two ticker symbols together on the daily gainers:

You can see HEAT and COOL are together in the gainers list. Isn’t that COOL? Or should I say they are HEATing up the Nasdaq?

This sad attempt at humour will not be repeated again here for a long, long time.