TEMPO Interactive, Jakarta:The publication of the inflation rate and the second quarter financial statement can boost the index further this week. The declining oil prices overseas followed by other commodities eased the threat of inflation.The composite stock price index (IHSG) at the Indonesia Stock Exchange (IDX) in last weeks trading significantly strengthened by 126.26 points (3.39 percent) to the level of 3,848.558, resulting in an index growth of 11.59 points (0.3 percent) this month after collapsing 114 points to the level of 3,722.Alfiansyah, an analyst from PT Valbury Asia Securities, said that the window dressing done by investment managers to decorate their portfolio performance approaching the end of the first semester of 2011 may support the index movement on the final week of this month.Moreover, Junes inflation rate is estimated to remain restrained and the Bank Indonesia interest rate may likely hold over. This opens the opportunity for the index to reach the level of 3,900, said Alfiansyah.The index is predicted to remain volatile with a tendency to strengthen this week within the range of 3,800 to 3,900. Investors confidence towards the growth of earnings as of the first semester in 2011 may assist the index movement and improve its highest record so far, gained on May 20, at the level of 3,872.95.There are still may problems which can affect the index movement, such as Greeces debt crisis and the US economic stimulus policy, said Alfiansyah.The policy, also known as Quantitative Easing II, which will end this month, will be the focus of investors, who will examine the US governments policy on spurring growth amid its sluggish economy and high unemployment rate.Alfiansyah further said that there was nothing to be concerned with regards to domestic factors because the economic outlook was still promising and the performance of listed companies was still good.VIVA B. KUSNANDAR