After less than six months of trading, the MacroShares up and down housing trusts have closed up shop. DMM (down) and UMM (up) hit an early termination trigger last week for having assets on deposit of less than $50 million. As shown in the charts below, the volume on these two securities became non-existent in recent months as investors shunned the product. MacroShares has had a rough go at it over the past two years. First, their up and down oil ETFs (UCR and DCR) went bust, and now this.