One lesson learned: in the current very unstable environment, there is no way to trade these highly volatile names while keeping a sound risk management policy. No damage was done to the portfolio as I did not trade any of these names.
Yesterday, I took a short position in LTM. The stock might bounce toward the 50MA. A break above it would cancel the trade.
This is the list for today. I will look at the easier - less volatile - long names such as MU and MPEL, with the objective to have a balanced portfolio.