ARA/ARB
ARA/ARB Calculator
Calculate daily price limit boundaries for Indonesian stocks (BEI).
Parameters
Enter a reference price to see today's ARA and ARB limits.
Enter a reference price to see results.
Frequently Asked Questions — ARA & ARB
ARA stands for Auto Rejection Atas — the maximum percentage a stock's price can increase in a single trading day on the Indonesia Stock Exchange (IDX). It prevents extreme price spikes and protects investors from manipulation.
ARB stands for Auto Rejection Bawah — the maximum percentage a stock's price can fall in a single trading day. It acts as a safety net against panic selling and market crashes.
The ARA percentage depends on the stock's price range. Stocks priced under Rp 200 have a 35% ARA limit, stocks between Rp 200–Rp 5,000 have 25%, and stocks above Rp 5,000 have 20%. This calculator applies those rules automatically.
Yes. On the first day of listing (IPO day), there is no lower limit (no ARB), and the ARA limit can go up to 35% regardless of price. This is why IPO stocks are often highly volatile on their listing day.
When a stock hits ARA consecutively, it means buyers are willing to pay the maximum price every day. This often signals strong demand, a bullish catalyst, or speculative activity. It's common in IPO stocks with limited supply.
Technically yes, but you join a queue of buyers at that price. If sellers don't appear, the stock stays at ARA and your order may not be filled. High ARA stocks often have many unfilled buy orders.
IDX policy exempts newly listed stocks from the lower auto rejection on their first trading day. The rationale is to let the market freely discover the stock's true value without an artificial floor.