Commercial banks trade trillions of dollars of derivative contracts, but what is their net exposure in derivatives markets? Plot the difference between what commercial banks are owed (FRED code: DFVACBW027SBOG) and what they owe (FRED code: DNVACBW027SBOG) on their derivative positions. Data is available only from 2010 until 2014.

[Hints: Do a chart for the series DFVACBW027SBOG. Then, to Line 1 in this chart Add the code for what banks owe (FRED code: DNVACBW027SBOG). At the formula box, type in a b (without the quotes). You will have just one line as a result, the difference of the two series.]