Naira Now 460 To a Dollar?? Chisos!!!

This is really serious oh. What is causing all these. why is the Naira still plummeting at this alarming rate?

The Nigerian Naira plunged further to a new record low today, down 1.76 percent against the dollar on the parallel market even as dollar supplies dry up.

The currency fell to 460 to the dollar on the black market, down from 452 at the close of trading yesterday.
Though the naira closed at 305.50 to the dollar on the official interbank market against 305 a dollar the previous day, traders said dollar liquidity remains a major challenge in the market. "Trading has continue to be thin on the interbank market as the dollar shortage persists while demand for the greenback remains strong," one dealer said.