Fiber optic cables manufacturer Optical Cable Corp. (Nasdaq:OCCF) said after Wednesday’s close that sales surged 21% in its fiscal second quarter, while earnings spiked 275%. Results were bolstered as increases in both of its specialty and commercial markets took flight over a broad customer base and product mix.

Shares gained 8%, or $0.48, to $6.58 in pre-market trading. For detailed price information and recent news stories about Optical Cable, click OCCF.