Meaning
Time delays occur between the measurement of an economic indicator and the actual adjustment of a related contract price. This indexation lag often arises because government agencies require time to collect and publish inflation or commodity data. The financial consequence of the delay is that a price remains fixed while the underlying costs have already changed.
This phenomenon is most visible in long term supply agreements and infrastructure projects.
Reference Gap
Contractual terms specify which month’s data will be used for the next period. If the indexation lag is three months, the price for January might be based on the data published in the previous October. This gap can lead to a mismatch between current expenses and current revenue.
Inflation Effect
Buyers and sellers experience different risks depending on whether prices are rising or falling. During periods of high inflation, a long indexation lag favors the buyer as the real value of the payment decreases before the adjustment occurs. Conversely, the seller benefits when inflation slows or turns negative.
Price Adjustment
Formulae in the agreement determine how the measured change is applied. Frequent updates can reduce the impact of the indexation lag but increase the administrative burden on the accounting teams. Most industrial contracts settle for a quarterly or semi annual update frequency.