Howmet slides after Elon Musk unveils SpaceX turbine-blade casting plan (HWM:NYSE)

Howmet Aerospace (HWM) fell as much as 7.7% to a two-month low Monday after Elon Musk said SpaceX plans to cast natural-gas turbine blades and vanes in-house, targeting a production bottleneck that has benefited specialized suppliers.

Musk said in a