FANDOM


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 427.90 Down -1.75

Historical chartEdit

Loading...

SummaryEdit

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

  • Start date: 15 December 2007 (at index of 100)
  • Index today: 427.90
  • Change today: Down -1.75
  • Number of items: 21 (last adjusted on 30 August 2014)
  • Index divisor: 21.2740 (last adjusted on 30 August 2014)

List of itemsEdit

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 rune59
Down
61025,000F2P iconview10 hours ago
Armadyl runeArmadyl rune593
Unchg
16024025,000P2P iconview9 hours ago
Astral runeAstral rune354
Down
8813225,000P2P iconview9 hours ago
Blood runeBlood rune575
Up
7311025,000P2P iconview9 hours ago
Body runeBody rune30
Down
6925,000F2P iconview9 hours ago
Chaos runeChaos rune91
Up
568425,000F2P iconview9 hours ago
Cosmic runeCosmic rune242
Down
9213925,000F2P iconview8 hours ago
Death runeDeath rune140
Up
12418625,000F2P iconview8 hours ago
Dust runeDust rune736
Unchg
81225,000P2P iconview8 hours ago
Earth runeEarth rune20
Unchg
61025,000F2P iconview8 hours ago
Fire runeFire rune79
Down
61025,000F2P iconview7 hours ago
Lava runeLava rune830
Unchg
81225,000P2P iconview6 hours ago
Law runeLaw rune308
Up
15122625,000F2P iconview6 hours ago
Mind runeMind rune18
Unchg
61025,000F2P iconview6 hours ago
Mist runeMist rune829
Unchg
81225,000P2P iconview6 hours ago
Mud runeMud rune626
Down
81225,000P2P iconview6 hours ago
Nature runeNature rune445
Up
497425,000F2P iconview6 hours ago
Smoke runeSmoke rune740
UpUp
81225,000P2P iconview4 hours ago
Soul runeSoul rune428
Up
16424625,000P2P iconview4 hours ago
Steam runeSteam rune874
Unchg
81225,000P2P iconview4 hours ago
Water runeWater rune26
Unchg
61025,000F2P iconview3 hours ago


AdjustmentsEdit

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}