It's not news. It's speculation, and it's pretty illogical. See here:
However, multiple reports in the bitcoin specialist press reported that Mt Gox's trustees won't sell anymore bitcoin until at least September this year. The next Mt Gox creditors meeting is not until September 18. NewsBTC said: "Many are hopeful that with the next Mt. Got court date six months away, Kobayashi won't be able to dump another load of coins on the market."
Notice how the most recent creditor meeting took place in March? Kobayashi was selling in December. Creditors were not notified when the courts approved earlier liquidations.
I'm guessing the trustee is facing a lot of blowback, especially after some of the public comments made by Jesse Powell and others. It's also not clear why the trustee would
need to liquidate any more assets, as it sounds like all liabilities are already covered. Those two points are why I don't think he'll be selling more for the foreseeable future.