JPMorgan analyst Gary Taylor attributes Tenet's (THC) 32% advance over the last two sessions to a combination of several factors - a "short squeeze" due to fears of more activist activity; the timing of the announcement of Glenview Capital's resignation of two board seats and intention to "evaluate other avenues to be a constructive owner" during the thinly-traded final half of August; and competitors' Sum-of-the-Parts valuations that he deems "unreasonable." Taylor, who believes HCA Holdings (HCA) and other local systems will continue to have interest in certain Tenet hospitals, but is "somewhat skeptical that HCA would consider an outright purchase," would not be chasing the short squeeze and keeps a Neutral rating on Tenet shares.