Rising crude oil prices could keep Indian investors cautious as uncertainty persists over a potential US-Iran deal to facilitate shipping through the Strait of Hormuz. US equities were trading largely flat, while July US Existing Home Sales data due tomorrow will provide a fresh read on the health of the US housing market. On the domestic earnings front, results from Siemens, Zydus Lifesciences, Info Edge, Rail Vikas Nigam and PI Industries could also influence market sentiment.