The IHSG gained 9.51 points, or 0.15 percent, to 6,413.32. The index of the 45 most liquid stocks inched up 2.32 points, or 0.23 percent, to 1,028.43.
Valbury Sekuritas chief researcher Alfiansyah has forecast that the IHSG's movement on Wednesday will be swayed by domestic and foreign sentiments.
"However, there will be a positive catalyst from the US market following a share price hike during Tuesday's trading, thereby opening room for the Asian market and serving as a trigger for the stock market at the BEI and the IHSG reference index to strengthen in today's share trading," he remarked.
Asian regional markets that weakened on Wednesday morning comprised Nikkei, decreasing 108.87 points, or 0.5 percent, to 21,729.75; the Hang Seng plunging 253.15 points, or 0.89 percent, to 28,719.53; and the Straits Times Index sliding 8.86 points, or 0.25 percent, to 3,381.99.