Spending power is a marketing term. It is not a measurement of actual wealth. That doesn't mean black folks have a trillion dollars to do whatever we want with.
"The phrase “buying power” is itself a marketing phrase developed to helped advertisers target their marketing. “Buying power” is the “power” to spend money that is specifically allotted for certain purchases but is not – as even the purveyors of the phrase admit – an indicator of income or wealth.
So, a bank WILL lend me $30k to buy a car but it will not give me that same amount to invest in stock, buy land, or start a business. So my “power” is in the ability to be seen as worthy of a car loan from a bank but does not mean I have $30k in the bank or in my pocket."
Trillion Dollars in Black Buying Power: Reality or Myth?
https://shoppeblack.us/2018/06/black-buying-power-myth-reality/