This paper investigates the lead-lag relationships among the spot, futures, and option markets on Taiwan Stock Exchange Capitalization Weighted Stock Index (TAIEX) by using 15-minute intraday data. Contrast to the prior research, we not only examine the effect of the intrinsic value of option and the types of option on the lead-lag relationships among stock, futures, and option markets, but also compare of the function of price discovery between a emerging derivative (TAIEX option) and a mature derivative (TAIEX futures). The empirical results are as followed: Firstly, the TAIEX futures lead the cash index, the call option, and the mini-TAIEX futures up to 15 minutes. Secondly, the cash index lead out-of-the-money call option up to 15 minutes. Finally, the speed of price reaction to new information for put option and in-the-money option is faster than that for call option and out-of-the-money option.