Market reversal and shifts according to the clock fall under the "This always happens, except when it doesn"t" premise.
09:30 EST market opens
10:10-10:25 first reversal
10:25- slightly milder reversal
11:20- beginning of lunchtime moody blues
13:30- lunchtime moody blues begin to cheer and clear -- some stocks star to edge up
14:30- stock break out (or down) in a more definitive manner
15:00- bonds stop trading; market breathes a sigh of relief, possible reversal
15:30- mild reversal possible
16:00- market closes