The 30-share barometer index, Sensex is expected to open in red on Wednesday tracking negative cues from the global markets. In the overnight trading, US stocks ended lower over geopolitical concerns, following which all the Asian markets were awash in red on Wednesday morning. Japan’s Nikkei 225 was down by 152 points at 15,167; Hong Kong’s Hang Seng was at 24,430, down by 217 points; China’s Shanghai Composite was at 2,193, down by 23 points; and Singapore’s Straits Times at down by nearly 7 points at 3,320.