From the transcript

Uh, so a part of the valuations that we've looked at for each asset class on the, on the last slide include the unrealized gains and losses for each of those categories. This represents the change in value from the time of purchase to the measurement date for the financials. On 6/30, we were carrying nearly $18 billion in unrealized gains across all asset classes. The green lines— they look green up there— the green lines here represent the liquid asset classes. So those gains are easily realized and, and are more frequently realized as we rebalance within the portfolio.