I think its been mentioned previously on this board but those ruling out a foreign stock just on liquidity of the PK use symbol may want to reconsider. I've purchased a number of foreign stocks of the years (mainly Canadian) that trade with a US pink sheet equivalent and with absolute certainty I know my volume was NOT reflected in the pink sheet that day. I don't know the specifics on how the trade is executed/cleared but if the foreign market the stock trades under has the liquidity I think one could trade it near the exchange rate price and not the typically larger Pink Sheet spread. I suggest the best way is to manually do the conversion in price to US dollars and then USE A LIMIT ORDER!
On Medivir I don't generally go after HCV companies but it may be interesting. I seem to recall though aren't they partnered with J&J. Does anyone know what economics they have and if their other drugs are partnered? OK I will admit I am too lazy to do the initial DD to decide if its worth looking at deeper .