Calculate daily price bands (Ceiling, Floor, Reference) for HOSE, HNX, and UPCoM securities factoring in Vietnam SSC rounding regulations.
The Ho Chi Minh City Stock Exchange (HOSE) hosts the largest blue-chips (e.g. Vingroup, Vietcombank) and enforces a strict ±7% daily band from the reference price.
The Hanoi Stock Exchange (HNX) features mid-caps and small-caps, allowing a wider ±10% daily fluctuation bracket.
The Unlisted Public Company Market (UPCoM) has the widest daily band of ±15%, catering to newly public or unlisted equities.
Ceiling/Floor Orders: In high-demand scenarios (such as an IPO listings or positive news), placing limit buy orders exactly at the Ceiling price maximizes your transaction probability.
Reference Price Calculation: On normal days, the Reference Price is the closing price of the previous day. On corporate action ex-dates, it adjusts based on stock dividend/cash split ratios.
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