Weeeee, keeping track of these shorts is quite amusing. I guess some play the game differently than others; regulatory rules and then there's prison rules, eh? Let's see, I believe we were up to ~60M shares needed to cover by end of session Monday, assuming Mr Market is following the proper procedures and not playing prison rules. 
Friday - 56% - 20130208|RFMK|13352708|0|23759140|O
Oops, well, I guess since there was more shorting today than covering (and regular buying, if any), we did not make any progress on covering those outstanding shorts. Hmmmm. Though there was also a T-trade printed after-hours today.
16:18:20 0.0017 7978097
So since PK stocks do not actually trade after hours, I guess we could consider this TRADE (not a "sell" or a "buy" or even a "sale" LOL) as being likely a buy to cover, in which case the short sale percentage for the day would still be high up above 40% but at least not over the suspicious 50%. So if we imagine all of todays shorts were already covered (non-DTC affiliated brokerages) and 100% of the rest of the volume consisted of buys to cover our running total of short sale transactions then that still leaves us with just about 40M shorts that still need to be covered by end of session Monday. Hmmmm, it should be interesting to see how the stock trades on Monday!! 
I suspect we could see a huge rise in volume on Monday if indeed we assume these firms are properly covering (T+3) as is claimed by some on message boards from the peanut gallery. Judging by past shennanigans, should ~40M shorts need covering, I suspect at least ~80M shares would need to trade because heavens no the sketchy market manipulators are not about to only cover (buy) and not dump, short, naked short and flip in the midst of buying to cover. I say "at least" because probably the increased volume would pull in flippers and traders and so they would be looking to short those transactions as well, so lets say ~20M retail volume plus the shorted side of that, so another ~20M (in new Monday short sales), and then maybe add another 5M or so shares just for good measure. My prediction is that Monday will trade about 125M shares, assuming everything is on the up and up, but no telling where PPS could go because we all know real natural price discovery has been absent in this market for some number of years. 
Now, it should be fun to watch what happens Monday!! Heheheh I guess we will know by Monday evening if all the accumulated short positions have been properly covered or not, or at least even had the chance of properly covering. If there is not sufficient volume then we will know from then on that the junk spewed by some about what is really happening behind the scenes is all just, well, a lot of ... cold air?!
GLTA
$RFMK
