Chapter 4 of 7 · 7 min read
The mechanics of an actual order: why you cannot buy just one share, what a limit order protects you from, and what happens in the two days after you buy.
What you'll learn
Key terms in this chapter
In one sentence: shares trade in fixed minimum bundles called board lots, you choose whether your order fills at any price or only at your price, and the shares land in your account two business days later.
Shares don't trade one at a time. Every stock has a minimum trade size called a board lot, set by PSE's own board lot table based on the stock's price range. Generally, the higher a stock's price, the smaller its board lot, and the lower the price, the larger the lot. You can't buy or sell a fraction of a board lot through a regular order, only whole multiples of it.
The practical effect surprises people: a cheap stock is not necessarily the cheaper thing to buy. A ₱500 stock with a board lot of 10 costs ₱5,000 for one lot. A ₱0.50 stock with a board lot of 10,000 also costs ₱5,000. The price on the ticker tells you almost nothing about the minimum cheque you need to write, which is why the board lot is the first thing to check once you have picked a company.
When you place an order, you also choose how it fills. A market order fills right away at whatever price is currently available, trading price certainty for the certainty of getting filled. A limit order only fills at a price you set, or better, which protects you from an unexpectedly bad fill but might not execute at all if the market never reaches your price.
Most broker platforms default to a market order but let you switch to a limit order in the same form. A limit order is generally the safer default for a first-time buyer, since it caps what you actually pay, or sets the least you'll accept on a sale.
Say a stock last traded at ₱50.00. A market buy order fills near ₱50.00, at whatever the best available price is the moment the order reaches the exchange, which can land slightly above or below depending on how the order book looks right then. A limit buy order set at ₱49.50 only fills if the price actually trades down to ₱49.50 or lower, so you might pay less, but you also might not get filled at all if the stock never drops that far. On a 100-share lot the difference between those two outcomes is ₱50, which is small; on a thinly traded stock where the next available seller is at ₱53.00, a market order can cost you far more than that, and the limit order is what stops it.
PSEye's prices are delayed or end-of-day, not a live tick-by-tick feed, so check your broker's own quote before an order goes in. Once your account is funded, placing a buy order generally goes like this:
That last step catches people out. Nothing is wrong if your shares are not visible the same afternoon. Settlement is a fixed two-business-day cycle, so a Thursday trade typically appears on Monday.
Write the trade down somewhere the moment it fills: the stock, the number of shares, the price you paid, the date, and the fee. Your broker shows a running position, but it will not tell you what a stock cost you across several purchases at different prices, and it will not keep the record if you ever move brokers.
PSEye's free PSE portfolio tracker does this without an account. Log each buy and sell and it works out your average cost, what the position is worth now, your gain or loss, and the profit you have actually locked in on anything sold. Everything stays in your own browser, so there is nothing to sign up for. If you would rather practise first, it has a paper trading mode that uses simulated cash against real prices.
The full PSE investing glossary covers everything else you'll run into on PSEye, in plain English. On the stock pages themselves, any term with a small icon next to it opens a quick definition without leaving the page.
Good to know
A market order fills immediately at whatever price is available right now; a limit order only fills at a price you set (or better), but might not fill at all if the market never reaches it. Most brokers default to market orders, but let you switch to a limit order in the same order form. See the Limit Order glossary entry →
No. PSEye's quotes are delayed or end-of-day, not a live tick-by-tick feed. Always check your broker's own quote before an order goes in, especially for a fast-moving stock.
This guide is general information, not personalized advice. More on what PSEye is and isn't.