The Hive Support Price and the Debt Ratio are actually lower than what the site shows. I suppose that the calculation is using the current Virtual Supply. However, the virtual supply does not account for all of the HIVE that is in reserve to support the price of HBD (and it is not shown in any block explorer).

To get an accurate reading of those metrics that "extra" HIVE needs to be calculated. First, the total potential supply is obtained by dividing the HIVE supply by 0.7. The difference between the potential and the actual supply gives the actual amount of HIVE that supports the price of HBD.

To complicate matters, the virtual supply that is shown on any block explorer is counting the balances in the DHF (and they should not be used to estimate the health of HBD). That is another reason to use a different method to calculate the debt ratio and the support price.

With the potential supply method, we get a support price of around 0.69 and a debt ratio of about 5.71% (as of yesterday).