The economic importance of oil and its price fluctuations

Oil serves as a vital resource in global economies, supporting the manufacture of numerous products and powering most forms of transport. As a central commodity, it underpins much of worldwide economic activity. Rises in oil prices can drive up the cost of goods and transport, contributing to higher inflation rates across economies. However, advancements in energy-saving technologies and a shift away from heavy manufacturing can lessen the effects of these price changes.

Characteristics of oil price movements

Oil prices experience significant volatility, with sharp rises and falls occurring over short periods. Both demand and supply for oil tend to be price inelastic, meaning that changes in price lead to only minor adjustments in the quantity demanded or supplied. This inelasticity stems partly from the challenges in rapidly boosting oil output, as discovering and developing new sources requires considerable time. Producers may also stockpile oil or restrict its release to the market to avoid driving prices down.

Factors affecting the demand for oil

Several elements influence the level of demand for oil, often linked to broader economic and environmental conditions. These factors can cause shifts in the demand curve, affecting global oil prices.

Key influences on oil demand

• Economic cycles - Demand rises during periods of economic expansion when production and consumption increase, but it drops during downturns as activity slows.
• Speculation - Traders buy and sell oil contracts to capitalise on expected price movements, which can amplify demand and lead to price swings.
• Value of the US dollar - Since oil is traded in US dollars, a weaker dollar enables buyers using other currencies to afford more oil, boosting demand.
• Derived demand from oil-based products - Greater need for items like plastics increases the demand for crude oil as a raw material.
• Availability of substitutes - The appeal of alternatives, such as biofuels, can reduce oil demand if they become more cost-effective or widely adopted.
• Weather patterns - Harsh conditions, like severe winters, heighten the need for heating fuels derived from oil.
• Rising living standards and income levels - As incomes grow, people consume more energy-intensive goods and services, such as larger homes and additional vehicles, increasing overall oil demand.

Factors affecting the supply of oil in the short run

In the short term, oil supply can be disrupted by sudden events or deliberate actions, leading to immediate impacts on availability and prices. These disruptions often result in higher costs for businesses reliant on oil, potentially prompting them to raise their own prices and reduce demand for their products.

Main short-run influences on oil supply

• Supply-side shocks - Events like wars or instability in oil-rich areas can halt production, causing supply shortages and sharp price hikes.
• Actions by OPEC - The Organisation of the Petroleum Exporting Countries (OPEC) wields substantial control over global supply by adjusting output levels among its members; reducing production can elevate prices, while increasing it can lower them.

Factors affecting the supply of oil in the long run

Over longer periods, oil supply is shaped by resource availability, economic viability, and technological progress. These factors determine the potential for sustained increases in output.

Key long-run influences on oil supply

• Extent of oil reserves - Larger known reserves allow for greater production capacity over time.
• Extraction costs - Some deposits only become profitable to extract at elevated oil prices, which can encourage development of challenging sources.
• Price incentives - Sustained high prices motivate companies to invest in exploring and tapping new reserves.
• Technological advancements - Improvements in drilling, extraction, and refining methods reduce costs and enhance efficiency, enabling higher supply levels.

Changes in oil market dynamics

The oil market responds to global shifts, with demand and supply interactions often leading to significant price changes due to the inelastic nature of both curves.

Effects of supply and demand shifts

• Impact of emerging market growth - Expanding economies increase global oil demand, but the short-run inelasticity of supply and demand results in substantial price rises rather than proportional quantity changes.
• Role of alternative extraction - Techniques like shale oil production can expand supply, shifting the supply curve rightward to boost output and lower prices; however, these methods may not perfectly substitute for traditional crude oil, and inelastic market conditions can lead to larger price drops than increases in quantity.

For instance, rapid growth in developing economies can push demand higher, shifting the demand curve to the right and raising prices. Producers might then limit output to keep prices elevated, although higher prices eventually signal the need for more production, which takes time to materialise.