SLR: recently imposed capital requirements on large banks. Banks don't hold cash, they hold reserves at the Fed. And reserves are included in the bank's leverag

SLR: recently imposed capital requirements on large banks. Banks don't hold cash, they hold reserves at the Fed. And reserves are included in the bank's leverage ratio, so by accepting too much cash the bank can end up pushing their leverage ratio beyond the SLR limit which is bad for business.