I was tempted to buy pre-market when I saw the news and the drop below 17. The market always over reacts when companies take charges. But I decided to avoid based on the chart lows in Oct last year.
I didn't think it would actually drop below 15.. But now it is a very compelling value. With revenue between 5-6 Billion $....this will recover. $500 million is a large write off. But the drop today has exceeded the damage of the charge. Technically, this is a strong buy at the current PPS.