I didn't have any HBD; So, I waited to respond.

Historically, I've always just used the internal market to trade HBD for HIVE. I wrongly remembered seeing the fee on both sides.

You are correct. Peakd says that the fee is in only one direction. This means that the HBD conversion formula is as good as it can get. The trade price of HBD seems to fluctuate between .95 and 1.00.

I still content that there is better things that we could be doing with HBD than the 20% interest. For example adding additional currencies.