The whole episode was very confusing. They didn't explain what was going on very well for the viewer, and it was especially difficult to follow if you weren't familiar with the ins and outs of 1970s stock trading.

I didn't understand McGarrett's willingness to listen to Laughlin's offer for a "deal". Usually McGarrett shouts, "NO DEALS!", but here he seemed to want to deal with the most major of the criminals (Laughlin, who committed multiple murders) to bust a stock thief (Murdock).

If ever there was a time to shout "NO DEALS!", it was this one!

Oddly enough, this episode might have been better off following the trail of the scammer played by Danny Kamekona, who was murdered very early in the episode for unrelated reasons!