It depends. Some people are in at 9:30 and out at 6pm. Some are in at 9:30 and out at 7pm or later. A lot depends on department and position, but I have found that even on sick days, vacation days, after office hours (9pm and later) you are expected to answer emails and/or respond to issues.
It's not investment banking but the NYC office keeps late'ish hours in most departments.
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