By way of clarification . . . the DXY is an index derived from selected weighted currency exchange rates.
None of the countries issuing these currencies claim any equivalency with gold.
Their currencies can be made plentiful with the swipe of pen.
Not quite so easy with gold.
The currencies of the main producers of new gold ( China, Russia, and Australia )
are not considered in the DXY calculation.
https://www.gold.org/goldhub/data/historical-mine-production
See the table below for today’s DXY calculation :
US Dollar Index (DXY) : Calculation
Component
Today's Cross Rate
Weight
Weighted Rate
EURUSD
1.17200
-0.57600
0.91264
USDJPY
110.75000
0.13600
1.89684
GBPUSD
1.36741
-0.11900
0.96345
USDCAD
1.26520
0.09100
1.02164
USDSEK
8.65000
0.04200
1.09485
USDCHF
0.92440
0.03600
0.99717
Scaling Constant
50.14348
USD Index (DXY) Today
93.28098
https://www.theice.com/publicdocs/futures_us/ICE_Dollar_Index_FAQ.pdf
(see equation on page 2)
USDX = 50.14348112 × EURUSD^-0.576
× USDJPY^0.136
× GBPUSD^-0.119
× USDCAD^0.091
× USDSEK^0.042
× USDCHF^0.036