NEW YORK — You’ll no longer be able to store your precious coins, jewelry and paperwork at JPMorgan Chase & Co., as the bank has stopped opening new safety deposit boxes for customers.

A spokesman for the bank said Chase decided late last year to stop offering new deposit boxes to customers as a “business decision” but declined to share specifics.

Customers who have a box with Chase will be able to keep the box as long as the branch stays open, but they will not be able to open a new one at another location. Banks long stopped opening up cavernous branches with dozens of teller windows and a vault the size of a one-bedroom apartment.

Reflecting the fact that customers may not enter a bank branch for months at a time, most branches are now designed to be small, with multiple ATMs, as well as breakout spaces so bankers can one-on-one interactions with customers when needed. Chase’s newest branches have not vaults for some time. Safety deposit boxes were never a highly profitable business for banks, often offered as an additional service to their most valued customers.

The vaults themselves are expensive to install and pose 24/7 security risks due to the valuables that were often stored inside, requiring bank employees to get specialized training to handle vault requests. Meanwhile, customers typically rent a box at a branch for $45-$150 a year, depending on size.