Mobile chipmaker Qualcomm Inc on Monday rejected rival Broadcom Ltd’s $103-billion takeover bid, saying the offer undervalued the company and would face regulatory hurdles. Shares of Qualcomm were up 1.8 percent at $65.74 in early afternoon trading, while those of Broadcom were down 0.4 percent at $263.95. Broadcom said it would seek to engage with Qualcomm’s board and management, adding that it had received …