State Street SPDR Portfolio Mortgage Backed Bond ETF (SPMB) current share price is $22.51. The gold spot price is $4,825.20 per troy ounce. Using the formula: SPMB in gold = $22.51 × 31.1035 ÷ $4,825.20 = 0.1451 grams of gold per share.
The Real Wealth Growth Rate measures the Compound Annual Growth Rate (CAGR) of SPMB when denominated in gold. A positive rate means the stock has outperformed gold as a store of value, while a negative rate indicates gold has been a better wealth preserver than holding SPMB shares over the measured period.
"Real Wealth Growth Rate" measures the annualised compound growth rate (CAGR) of a stock when priced in gold — hard money that cannot be printed. A positive value means genuine wealth creation. A negative value means purchasing power is shrinking, even if the dollar price rises.
