ISO New England Spot Electricity Spikes To Over $220/MWh -- December 18, 2017

Link here.

Too much non-dispatchable wind and solar and not enough natural gas?

For comparison: PJM -- under $23/MWh. See comments below:

For comparative purposes, the wholesale spot pricing in 13 state PJM region - found at PJM site/Data Shortcuts/Operational Data - is under 23 bucks.

This is why businesses all over the world are looking at relocating there. 

The problem lies in the bars at the right side of the graph:

Meanwhile, South Australia and Victoria will see spot prices for electricity hit $315/MWh later today. Link here.