because Ripple =/= XRP
whenever you hear a news about some partnership between some company, banks, corporation,... and a cryptocurrency (in this case ripple) all they care about is the technology that they are using.
in this case these banks are interested in the blockchain technology and how Ripple is doing stuff so that they can make their own centralized system based on it.
fake news like this can shortly pump these altcoins but not every time and specially not when they are already in a big bubble and are getting dumped hard.
This its right my bank country Indonesia too meet Team Ripple it's not interested about the XRP but the bank interesting about the technology well for partnership the price will fall but if the market backup, XRP will backup really fast because of bank partner maybe.