In that article, Gox say quite clearly "“We have no problems with liquidity and we never have”.
From their perspective,
Mt. Gox doesn't have a liquidity problem. Their
customers may have a problem, but Mt. Gox doesn't, since they don't have a hard obligation to pay up on a specific number of days after the trade. If they had to settle by T+2, like everybody else in foreign exchange, they'd be dead by now.
In the real world, when you sell a stock, you must be paid by T+3, that is, the third business day after the trade. Money market funds usually settle on T+1. Foreign exchange transactions settle by T+2. These are hard limits - a brokerage that fails to meet the settlement date is in default, in big trouble, and may be out of business within days. That happened to Lehman. Hero to zero in three days. (Here's the
dramatized version of the Lehman collapse, courtesy of the BBC.)
Note that Mt. Gox did
not say that they have 100% of customer funds. Their terms of service say they must keep 100% of customer funds in a segregated account. Whether they actually have all the money is an open question.
