GRAY 10:19:10

Switched to TZA EOD Friday. DOWN 2MORO. Mean Gray 10:19:10 pre-market change -2.58%, whereas TNA only closed a mean of -0.23% after the open (7 occurrences). However, THE MEAN DAYTIME % CHANGE DIFF BETWEEN CLOSE & LOW WAS -1.60%, so TZA could be bought at the open. Green 10:19:10 (4 occurrences)

went up a mean 1.44% pre-open and a further (open to close) mean of 1.27% during the routine daytime trading.