https://research.stlouisfed.org/fred2/

Central banks occasionally engage in liquidity swaps with each other. Plot and interpret the Feds provision of dollar liquidity swaps (FRED code: SWPT) to other central banks since 2007. To facilitate your interpretation, view the FRED Notes about this data series.

[Hint: Using the plot for SWPT consider the description below it in the Notes section. Explain briefly the observed pattern of liquidity swaps]