Machines are replacing humans in some financial markets, but the London Metal Exchange put its weight behind the old ways Monday.

The LME's 137-year-old open-outcry trading floor-a circular pit known as the "ring" where traders execute deals face-to-face-has earned a stay of execution. The exchange considered the ring's future as part of a broader review of operations, but has now no plans to close it, following a six-month review and consultation period.