Their trading volume is non existant!

I assume their initial distribution was very bad/questionable. If it was a crypto-currency I wouldn't go near it.
I do notice from the NuShares site that...
https://nubits.com/nushares/introductionAs of August 2015 there are approximately 835,000,000 NSR and this supply will increase at a rate of approximately 2% per year. The supply increases as Proof-of-Stake minting rewards are given to active individual minters. The current reward per block is 40 NuShares. The current block spacing time is approximately one minute.
So the 2% POS minting may encourage people to keep their NuShares minting and off the exchange.
Depending how their supposed $400 000 in dividends this last year were awarded and how often, might also give people an incentive to keep their NuShares in their wallet and off the exchange.
In general though how NuBits are awarded seems very questionable & I doubt they have enough reserves to cope with a lot of selling.
https://discuss.nubits.com/t/voting-150k-for-tier-4-sell-side-liquidity-extremely-urgent/3035The fact that their parking rate has been at zero for a few months and that demand for their product seems to be shooting up with BTC's increased volatility, means they'll probably get away with their pretty risky practices for a while.
I know very little about NuShares though, just started looking at them a bit yesterday, when I noticed their price increase.
Edit: They also think diluting NuShares further is viable in an emergency
With that in mind, we are well prepared to handle any sudden sell volume with more than 500 BTC in tier 4, park rates that have been at zero for many months, and the possibility of tapping our market cap at a higher level than has been the case in many months..
but with no volume/buy support as you say that looks like a non option.