求助gwd21-28

doudouzhu

since it has become known tha several of a bank's top executives have been buying shares in their own banks, the bank's depositors, who had been worried by rumor that the bank faced impending financial collapse, have been greatly relieved. They reason tha since top executives have faith in the bank's financial soundness, thouse worrisome rumors must be false. They might well be overoptimistic, however since corporate executives have sometimes bought shares in their own companies in a calculated attempt ot dispel negative rumors that about the company's health.

亲爱的战友们，请问后面那句话的however可是提前到什么位置？谢谢大家！