This means I cannot rely on GLBSE for other than advertising my fund as such a trade cost is unacceptable. For electrons moving around that is insane.
Luckily it looks like my friend might be interested in making some competition* for GLBSE - until then I will allow my investors to trade bonds at market rate manually via contacting myself.
You see my bond is an inflation secure fiat based bond so I want people to hold it instead of dollars when they think BTC will crash and then quickly resell. They can't do that unless the trade fee is small.
Anyway thanks for the info!
EDIT:
*A small site for trading my bond(s), not a full new GLBSE... that's not even in the plans right now.
Percentage based fees do seem to be "traditional" it seems. However the Open Transactions software does not even have a mechanism for taking such percentages, so you might find Open Transactions a useful platform, depending upon the scale of trades. Open Transactions charges "usage tokens" for making API calls, so enquiring whether any offers even exist costs about the same as making an offer or taking someone up on an offer, and the actual value of what is offered simply does not enter into the fee calculation at all.
-MarkM-