Quote from TM_Direct:
"Stocks beginning with A, E, I, O, U and sometimes Y are currently unavailable for trading."
May not be what you think Aphex....I thought it was a software glitch but much to my surprise it was mentioned to me by a regulator that " we've had to take ARC down a lot lately because they are not responding to orders for 30 second or more"...they went on to explain that they sometimes have TOO much volume and rather then turn it away it basically piles up...
