I worked out the cumulative return 0.021531357 so far if you had from IPO.
Which means that we have paid back the dollar value of the bond.
at IPO BTC0.15 * $100 = $15
payout BTC0.021531357 * $810 = 17.44039917
We got a long way to go to cover the BTC however.
This is the right way to be looking at things for most of us, for those that started with USD we are past ROI.