According to the rules of NASDAQ, a company must maintain a stock value of greater than $1.00 to remain on the NASDAQ stock market. As of the close of Friday's trading, Banco Popular finished the day at $1.37. So far, they have been as low as $1.30, so they are getting dangerously close to either de-listing from NASDAQ, un-splitting their stock (assuming it has split sometime during it's history), or a hostile take-over.
An option available to them, but which usually causes further de-valuation, is to un-split their shares. In order to maintain a company's stock price so that "normal" traders can afford it, sometimes a company can split it's stock. For example, let's say at one point Banco Popular was valued at $50. They could declare a stock split and issue two shares for every existing single share, which would reduce the price to $25. I'll have to do additional research to see if Banco Popular has done this, but I don't ever remember hearing about a Banco Popular stock split.