What is the sentiment of this news? Please choose an answer from {strong negative/moderately negative/mildly negative/neutral/mildly positive/moderately positive/strong positive}.
Text: AbbVie will be releasing Phase 2 data for its experimental Cystic Fibrosis (CF) drugs that could potentially compete with Vertex's drugs. VRTX stock may move up or down, inversely related to the AbbVie data set.
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mildly negative
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