The gold spot fix is the LBMA benchmark auction, run twice each London business day, in which participants submit buy and sell volumes across multiple electronic rounds until the imbalance clears within tolerance. The final print becomes the industry benchmark price that miners, refiners, exchange-traded funds, central banks and structured products settle physical gold contracts against.
Continuous spot gold is a separate over-the-counter price, so the fix and a broker XAUUSD tick are not the same number. Because large hedging flow concentrates into the auction window, retail charts often show a burst of volume and a short move that partly reverts, which is order-flow mechanics rather than new information, and is best treated with the same caution as a scheduled data release.