Secondary offerings have gotten me at least two times for 10% losses or more.
They have been happening in stocks that had been in bear markets for many years like coal and steel.
I really need to be wary of these stocks in the future. If they have flashed signs of weakness such as a high volume peak in the past and a recent very high volume up day, these are pretty clear signals that something fishy is about to happen in this stock. Get out while you can!