Mandiri Sekuritas expects Indonesia rate hike on currency weakness By Investing.com

Mandiri Sekuritas sees a 60% probability that Bank Indonesia raises its policy rate by 25 bps to 5.00% on May 20, versus a 40% chance it keeps using non-BI Rate tools. The call is driven by Rupiah weakness of more than 2% since the April meeting and foreign exchange reserves falling to 5.8 months of imports, despite solid Q1 GDP growth and loan growth. The article reinforces a hawkish BI outlook and defensive FX backdrop.

Analysis

A 25 bp tightening in this setup is less about inflation control and more about defending the balance sheet of the country’s external system. The second-order effect is that domestic liquidity gets pulled in two directions at once: offshore funding becomes more expensive while onshore banks are asked to absorb higher sterilization rates, which tends to compress NIMs for deposit-heavy lenders and tighten credit creation with a lag of 1-2 quarters.

The market is likely underestimating how quickly this can become a real-economy growth tradeoff if the currency stays weak. Higher policy rates can stabilize the FX briefly, but if reserves are still bleeding and the central bank is already leaning on non-rate tools, the signal to investors is that conventional policy is nearing its limits; that often keeps local-duration assets and bank equities capped even if the hike is delivered.

The contrarian angle is that this may be closer to a tactical defense than the start of a sustained hiking cycle. If the rupiah stabilizes on a softer dollar or improved risk sentiment, BI could pause after one move and continue managing liquidity through instruments rather than the headline rate, which would be mildly supportive for banks and domestic cyclicals. The trade is therefore less about the size of one hike and more about whether markets believe the central bank has regained control of the FX/reserve trajectory over the next 4-8 weeks.

Key Decisions for Investors

• Buy USDIDR upside via 1-3 month call spreads ahead of the meeting; the asymmetry is favorable if BI disappoints or signals limited reserve ammunition. Risk/reward improves if spot remains within 1-2% of recent highs going into the decision.
• Underweight Indonesian banks with high deposit beta and meaningful duration exposure for the next 1-2 quarters; higher policy/sterilization rates should pressure NIMs before loan repricing fully offsets. Prefer exporters or balance-sheet hedges over domestic lenders.
• Pair trade: long hard-currency EM sovereigns / short local-rate-sensitive Indonesia proxies for 1-2 months. The thesis is that external fragility, not growth, will dominate pricing until reserves stabilize; stop if USD softens materially and reserve data improve.
• If using equity exposure, favor Indonesian exporters with USD revenue over domestic consumption names; they are natural hedges if rupiah weakness persists and policy stays hawkish. This works best over a 3-6 month horizon.
• Avoid chasing local duration until after the meeting and the next reserve print; the cleaner entry is after the market sees whether BI is forced to keep tightening liquidity even if the headline rate is unchanged.