I've held UMC for over 12 months. Not as big a holding as many on this thread but approx 100k. I've seen two peaks during this time and it did cross my mind that if I'd sold on the highs and bought back on the lows I'd now have a much larger holding. Maybe 200k. Why wouldn't I sell on Tuesday and wait for another low to buy back in? This seems to be the trend over the past months.