RuneScape:Grand Exchange Market Watch/Rune Index

The Rune Index is made up of a weighted average of all of the current runes listed in the Market Watch, with the starting date of this average on 15 December 2007, at an index of 100. The overall rising and falling of rune prices is reflected in this index.

While specialised for just watching rune prices, it is set up and adjusted in a manner similar to the Common Trade Index, and the divisor may be adjusted to include new runes added by Jagex (see the FAQ for more information).

As of today, this index is 573.23  +0.30

Historical chart

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Summary

Any suggested changes to this index should be added to the talk page.

• Start date: 15 December 2007 (at index of 100)
• Index today: 573.23
• Change today:  +0.30
• Number of items: 21 (last adjusted on 30 August 2014)
• Index divisor: 21.2740 (last adjusted on 30 August 2014)

List of items

This is the current list of runes included in this index:

Adjustments

Icon	Item	Price	Direction	Low Alch	High Alch	Limit	Members	Details	Last updated
	Air rune	90		6	10	25,000		view	4 years ago
	Armadyl rune	326		160	240	25,000		view	4 years ago
	Astral rune	415		88	132	25,000		view	4 years ago
	Blood rune	678		73	110	25,000		view	4 years ago
	Body rune	48		6	9	25,000		view	4 years ago
	Chaos rune	152		56	84	25,000		view	4 years ago
	Cosmic rune	412		92	139	25,000		view	4 years ago
	Death rune	232		124	186	25,000		view	4 years ago
	Dust rune	985		8	12	25,000		view	4 years ago
	Earth rune	18		6	10	25,000		view	4 years ago
	Fire rune	159		6	10	25,000		view	4 years ago
	Lava rune	966		8	12	25,000		view	4 years ago
	Law rune	570		151	226	25,000		view	4 years ago
	Mind rune	19		6	10	25,000		view	4 years ago
	Mist rune	1,163		8	12	25,000		view	4 years ago
	Mud rune	868		8	12	25,000		view	4 years ago
	Nature rune	405		49	74	25,000		view	4 years ago
	Smoke rune	1,011		8	12	25,000		view	4 years ago
	Soul rune	1,345		164	246	25,000		view	4 years ago
	Steam rune	999		8	12	25,000		view	4 years ago
	Water rune	25		6	10	25,000		view	4 years ago

14 October 2011

Adjusted index: Rune Index Adjustment date: 14 October 2011 Affected templates: Template:GE Rune Index and Template:GE Rune Index/Diff Added item(s): Armadyl rune Removed item(s): None Items before adjustment: 14 Items after adjustment: 15 Divisor before adjustment: 14.000 Divisor after adjustment:15.5671 Item Base date Base price Price on adjustment date Comments Air rune 15 December 2007 11 6 Unchanged Mind rune 10 3 Water rune 15 6 Earth rune 11 13 Fire rune 10 4 Body rune 9 5 Cosmic rune 140 107 Chaos rune 102 38 Nature rune 258 100 Law rune 304 158 Death rune 299 181 Astral rune 132 81 Blood rune 336 211 Soul rune 335 556 Armadyl rune – – 1,817 Added item Calculations From the old divisor obtained from the templates: ${div}_{\text{old}} = 14.0000$ We need to calculate a new divisor: ${div}_{\text{new}} = {div}_{\text{old}} \times \frac{\sum \left ( \frac{p}{q} \right )_{\text{new}}}{\sum \left ( \frac{p}{q} \right )_{\text{old}}}$ To calculate the new divisor, we need to find: $\begin{align} \sum \left ( \frac{p}{q} \right )_{\text{old}} & = \text{sum of ratios prior to change} \\ & = \frac{6}{11} + \frac{3}{10} + \frac{6}{15} + \dots + \frac{556}{335} \\ & = 8.93366198 \text{ (up to 8 d.p.)} \end{align}$ And also: $\begin{align} \sum \left ( \frac{p}{q} \right )_{\text{new}} & = \text{sum of ratios prior to change} - \text{sum of removed ratios} + \text{sum of added ratios} \\ & = \sum \left ( \frac{p}{q} \right )_{\text{old}} - \text{sum of removed ratios} + \text{number of added items} \\ & = 8.93366198 - 0 + 1 \\ & = 9.933661982 \text{ (up to 8 d.p.)} \end{align}$ Thus, the new divisor is: $\begin{align} {div}_{\text{new}} & = {div}_{\text{old}} \times \frac{\sum \left ( \frac{p}{q} \right )_{\text{new}}}{\sum \left ( \frac{p}{q} \right )_{\text{old}}} \\ & = 14.0000 \times \frac{9.93366198}{8.93366198} \\ & = 15.5671 \text{ (4 d.p.)} \end{align}$

30 August 2014

Adjusted index: Rune Index Adjustment date: 30 August 2014 Affected templates: Template:GE Rune Index and Template:GE Rune Index/Diff Added item(s): Steam rune, Mist rune, Dust rune, Smoke rune, Mud rune, Lava rune Removed item(s): None Items before adjustment: 15 Items after adjustment: 21 Divisor before adjustment: 15.5671 Divisor after adjustment: 21.2740 Item Base date Base price Price on adjustment date Comments Air rune 15 December 2007 11 19 Unchanged Mind rune 10 6 Water rune 15 26 Earth rune 11 14 Fire rune 10 22 Body rune 9 8 Cosmic rune 140 245 Chaos rune 102 41 Nature rune 258 263 Law rune 304 281 Death rune 299 163 Astral rune 132 245 Blood rune 336 261 Soul rune 335 153 Armadyl rune 14 October 2011 1,817 389 Steam rune – – 37 Added item Mist rune 348 Dust rune 66 Smoke rune 314 Mud rune 775 Lava rune 49 Calculations From the old divisor obtained from the templates: ${div}_{\text{old}} = 15.5671$ We need to calculate a new divisor: ${div}_{\text{new}} = {div}_{\text{old}} \times \frac{\sum \left ( \frac{p}{q} \right )_{\text{new}}}{\sum \left ( \frac{p}{q} \right )_{\text{old}}}$ To calculate the new divisor, we need to find: $\begin{align} \sum \left ( \frac{p}{q} \right )_{\text{old}} & = \text{sum of ratios prior to change} \\ & = \frac{19}{11} + \frac{6}{10} + \frac{26}{15} + \dots + \frac{153}{335} + \frac{389}{1,817} \\ & = 16.36670735 \text{ (up to 8 d.p.)} \end{align}$ And also: $\begin{align} \sum \left ( \frac{p}{q} \right )_{\text{new}} & = \text{sum of ratios prior to change} - \text{sum of removed ratios} + \text{sum of added ratios} \\ & = \sum \left ( \frac{p}{q} \right )_{\text{old}} - \text{sum of removed ratios} + \text{number of added items} \\ & = 16.36670735 - 0 + 6 \\ & = 22.36670735 \text{ (up to 8 d.p.)} \end{align}$ Thus, the new divisor is: $\begin{align} {div}_{\text{new}} & = {div}_{\text{old}} \times \frac{\sum \left ( \frac{p}{q} \right )_{\text{new}}}{\sum \left ( \frac{p}{q} \right )_{\text{old}}} \\ & = 15.5671 \times \frac{22.36670735}{16.36670735} \\ & = 21.2740 \text{ (4 d.p.)} \end{align}$