"ts_diff(Yield.w)" "ts_diff(SAR3M.w)" "ts_diff(Pi.m)"
"ts_diff(Yield.w)" 1 0.750932919529011 0.690582727892613
"ts_diff(SAR3M.w)" 0.750932919529011 1 0.57217715542727
"ts_diff(Pi.m)" 0.690582727892613 0.57217715542727 1
