As for today's action - it followed May 9th's action to the T. Open on a huge gap up, settle down for a while, peak mid day, then close back close to the settle down point.
I think May 9th's action was very different than today. On May 9th (I was riveted to the ticker all day) there was quite a bit of volatility throughout the day (opened at 70, hit low of 64, hit high of 75, was most of day at 72 around, and closed a bit below 70). Today, the stock seemed like it was stuck with little volatility, everything within 153-157 basically.