The Financial sector certainly played a role, but more important at least for the rising itself was financing by the Central Powers (who were almost completely isolated from mainstream international finance by 1917) and seizing material from defeated Imperial forces in places like Russia, Hungary, and ultimately Germany.
The Sealed Train here is a pretty good overview of German military meddling and financing for the Bolsheviks during Lenin's journey "home" and in the "October Coup."
The Financial sector certainly played a role, but more important at least for the rising itself was financing by the Central Powers (who were almost completely isolated from mainstream international finance by 1917) and seizing material from defeated Imperial forces in places like Russia, Hungary, and ultimately Germany.
The Sealed Train here is a pretty good overview of German military meddling and financing for the Bolsheviks during Lenin's journey "home" and in the "October Coup."
https://cdn.preterhuman.net/texts/religion.occult.new_age/occult.conspiracy.and.related/Pearson%20-%20The%20Sealed%20Train%20(Lenin's%20secret%20journey%20from%20Switzerland%20to%20Russia)%20(1975).pdf