Increasing unusual option volume: ACI NNDM TPX STZ CENX

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ARCH COAL, Inc. (NYSE: ACI) Delayed: 15.39 +0.11 (0.72%)
Previous Close $15.28    52 Week High $10.35 
Open $15.30    52 Week Low $0.17 
Day High $15.59    P/E N/A 
Day Low $15.01    EPS $-3.52 
Volume 6,855,355