A run-up may be fuelled by (investor optimism).Logical formLearned from8 sentences. Investors may alternate between optimism.Logical formLearned from8 sentences. (Business confidence) may generate optimism.Logical formLearned from8 sentences. An optimism may dissipate in days.Logical formLearned from8 sentences. Economic data may fuel optimism.Logical formLearned from8 sentences. Figures may lift optimism.Logical formLearned from8 sentences. An optimism can be about (bank balance sheets).Logical formLearned from8 sentences. Traders may show optimism.Logical formLearned from8 sentences. A (crude inventory increase) may spark (investor optimism).Logical formLearned from8 sentences. Optimism can be for change.Logical formLearned from8 sentences. Hints may pertain-to an optimism.Logical formLearned from8 sentences. Optimism can be for a rebound.Logical formLearned from8 sentences. An establishment may temper optimism.Logical formLearned from8 sentences. Optimism can be in a standoff.Logical formLearned from8 sentences. A summit may come at a time of optimism.Logical formLearned from8 sentences.