Actually, as I think about how resilient share price was yesterday, my leading theory as to what happened is that some institutional investor transferred shares through an arranged sale/buy and since it may have occurred when the share price was slightly negative it triggered automated momentum trading models. I hope so.

Take a look at the 1 year chart for possible guidance on how to play MNKD leading into pdufa: http://finance.yahoo.com/echarts?s=CLSN+Interactive#symbol=clsn;range=1y;compare=;indicator=volume;charttype=area;crosshair=on;ohlcvalues=0;logscale=off;source=undefined;