Ive debated this topic with myself for awhile now and I'm interested to hear from the more experienced traders opinions. I know on a larger timeframe options can lead equities, just about every major decline recently was priced into options before it happened. Atm, options are pricing in another fall as evidenced by the VIX and the premium on put options. Also we know informed/inside traders are more likely to use options which should give the most dominant lead-lag effect over stocks, but this doesn't necessarily occur on a minute by minute basis. Regarding intra-day trading, say a stock is trading flat but then the stock call options start getting bid up, should the stock follow? and vice versa for a stock moving, whilst options stay flat? obvious answer is yes, but to what effect does it play out? do any of you stock day trading guys watch the corresponding options? thanks, jonny.