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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 Up +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: Up +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:

Icon Item Price Direction Low Alch High Alch Limit Members Details Last updated
Air runeAir rune90
Unchg
61025,000F2P iconview11 days ago
Armadyl runeArmadyl rune326
Unchg
16024025,000P2P iconview11 days ago
Astral runeAstral rune415
Down
8813225,000P2P iconview11 days ago
Blood runeBlood rune678
Down
7311025,000P2P iconview11 days ago
Body runeBody rune48
Up
6925,000F2P iconview11 days ago
Chaos runeChaos rune152
UpUp
568425,000F2P iconview11 days ago
Cosmic runeCosmic rune412
Down
9213925,000F2P iconview11 days ago
Death runeDeath rune232
Down
12418625,000F2P iconview11 days ago
Dust runeDust rune985
Down
81225,000P2P iconview11 days ago
Earth runeEarth rune18
Down
61025,000F2P iconview11 days ago
Fire runeFire rune159
UpUp
61025,000F2P iconview11 days ago
Lava runeLava rune966
Down
81225,000P2P iconview11 days ago
Law runeLaw rune570
Down
15122625,000F2P iconview11 days ago
Mind runeMind rune19
Unchg
61025,000F2P iconview11 days ago
Mist runeMist rune1,163
Up
81225,000P2P iconview11 days ago
Mud runeMud rune868
Down
81225,000P2P iconview11 days ago
Nature runeNature rune405
Up
497425,000F2P iconview11 days ago
Smoke runeSmoke rune1,011
Down
81225,000P2P iconview11 days ago
Soul runeSoul rune1,345
UpUp
16424625,000P2P iconview11 days ago
Steam runeSteam rune999
Unchg
81225,000P2P iconview11 days ago
Water runeWater rune25
Unchg
61025,000F2P iconview14 days ago


Adjustments

14 October 2011
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
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} $
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