Stock Investment Calculators

Averaging down means buying more shares of a stock you already own at a lower price than your existing average. This lowers your weighted-average cost per share. A lower average is not automatically a profit — it simply means your break-even price has dropped.

Averaging up means buying more shares at a higher price than your existing average. This raises your weighted-average cost per share. Investors often do this when they expect the price to keep rising, but it increases the price at which they break even.

On the Philippine Stock Exchange, shares must normally be bought in multiples of a board lot, which is set by the stock’s reference price for the day. The calculator rounds the required or affordable shares up or down to the nearest valid board-lot multiple, so the quantity it recommends can actually be traded as a normal-lot order.

Yes. The calculator estimates PSE buying fees — brokerage commission, VAT on commission, PSE transaction fee, SCCP clearing fee, and the SRC fee where applicable — using editable default rates under Advanced Settings. The main average-price calculation uses the gross weighted-average price (excluding new fees) to match the standard average-price formula, and the estimated buying fees are shown separately. For the Investment Budget mode, the budget you enter already includes the estimated buying fees. Actual broker charges may vary.

Because additional shares must be rounded up to a complete board lot, the actual resulting average can land slightly beyond your requested target instead of exactly on it. The calculator never displays your target as the achieved average unless the math actually produces that value. For averaging down the result reaches or falls below the target; for averaging up it reaches or exceeds the target.