Since it has become known that several of a bank' s top executives have been buying shares in their own bank, the bank' s depositors, who had been worried by rumors that the bank faced impending financial collapse, have been greatly relieved  They reason that since <b> top executives evidently have faith in the bank' s financial soundness </b>, those worrisome rumors must be false
<b> They might well be overoptimistic </b>, however, since corporate executives have sometimes bought shares in their own company in a calculated attempt to dispel negative rumors about the company' s health
The first is an intermediate conclusion that forms part of the reasoning called into question by the argument; the second is the main conclusion of the argument.