An OEIC (pronounced “oik”), or Open-Ended Investment Company, is one of the most common types of investment funds in the United Kingdom. Think of it as a giant, shared wallet where thousands of investors pool their money. A professional Fund Manager then takes this collective pot and invests it in a diversified portfolio of assets, such as stocks, Bonds, and property. The “open-ended” part is the key feature: the fund can create new shares whenever new investors want to buy in and cancel shares when existing investors want to sell. This means the size of the fund grows and shrinks based on investor demand. For American investors, the concept will sound remarkably familiar—an OEIC is the UK's close cousin to the US Mutual Fund. They serve the same purpose and operate in a very similar fashion, just under a different regulatory wrapper.
The structure of an OEIC is what makes it so flexible. Unlike a Closed-End Fund (also known as an Investment Trust), which has a fixed number of shares traded on a stock exchange like any other company, an OEIC's number of shares is not fixed. When you invest in an OEIC, the fund company creates brand new shares just for you. When you sell, your shares are cancelled and disappear. This direct creation and cancellation process ensures the fund's share price is always tied directly to the value of its underlying investments, a figure known as the Net Asset Value (NAV). There's no premium or discount based on market sentiment for the fund itself, which can happen with closed-end funds. Your investment's value is purely a reflection of the performance of the assets held within the fund.
The price of an OEIC share is calculated based on its NAV. The formula is simple: (Total Value of All Assets - Total Liabilities) / Total Number of Shares in Issue = NAV per Share This calculation is typically done once per day, usually at a set time (e.g., noon). All buy and sell orders placed during the day are executed at this single price. This is known as a single-pricing structure, which is more transparent and straightforward than the older dual-pricing system (a bid-offer spread) that was common with its older UK relative, the Unit Trust.
At first glance, OEICs and Unit Trusts look like twins. Both are open-ended collective investment schemes popular in the UK. The main difference lies in their legal structure:
Historically, Unit Trusts used dual pricing (a higher price to buy and a lower price to sell), while OEICs championed single pricing. Today, however, many Unit Trusts have also adopted single pricing, making the practical difference for the average investor minimal. OEICs are now generally the more modern and popular structure for new funds launched in the UK.
For an American investor, an OEIC is functionally identical to a US Mutual Fund.
The main distinction is geographic and regulatory. You'll buy Mutual Funds in the US and OEICs in the UK. It's like calling it 'football' in London and 'soccer' in New York—it's the same game with slightly different local rules.
OEICs, like any fund, can be a fantastic tool or a costly mistake. A savvy value investor must look under the hood.
Here's the breakdown from a value-focused viewpoint:
A true value investor doesn't dismiss OEICs but scrutinizes them. The key is not to just buy a “popular” fund but to find one that offers genuine value.