RuneScape:Grand Exchange Market Watch/Discontinued Rare Index

The Discontinued Rare Index is made up of a weighted average of all of the discontinued rare items listed in the Market Watch, with the starting date of this average on 31 December 2008, at an index of 100. The overall rising and falling of discontinued rare item prices is reflected in this index.

While specialised for just watching discontinued rare item 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 rare items "discontinued" by Jagex (see the FAQ for more information).

As of today, this index is 4,921.30

Historical chart

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Summary

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

• Start date: 31 December 2008 (at index of 100)
• Index today: 4,921.30
• Change today:
• Number of items: 24 (last adjusted on 30 December 2014)
• Index divisor: 15.6373 (last adjusted on 30 December 2014)

List of items

This is the current list of rare items included in this index:

Adjustments

Icon	Item	Price	Direction	Low Alch	High Alch	Limit	Members	Details	Last updated
	Blue hallowe'en mask	628,875,338		6	9	2		view	4 years ago
	Green hallowe'en mask	502,296,200		6	9	2		view	4 years ago
	Red hallowe'en mask	787,738,019		6	9	2		view	4 years ago
	Pumpkin	414,675,937		12	18	2		view	4 years ago
	Blue partyhat	2,147,483,647		0	0	2		view	4 years ago
	Christmas cracker	2,147,483,647		0	0	2		view	4 years ago
	Green partyhat	2,147,483,647		0	0	2		view	4 years ago
	Purple partyhat	2,147,483,647		0	0	2		view	4 years ago
	Red partyhat	2,147,483,647		0	0	2		view	4 years ago
	White partyhat	2,147,483,647		0	0	2		view	4 years ago
	Yellow partyhat	2,147,483,647		0	0	2		view	4 years ago
	Easter egg	251,051,934		4	6	2		view	4 years ago
	Santa hat	1,192,527,006		64	96	2		view	4 years ago
	Disk of returning	915,870,738		4	7	2		view	4 years ago
	Half full wine jug	1,503,334,020		0	0	2		view	4 years ago
	Black Santa hat	2,147,483,340		64	96	2		view	4 years ago
	Christmas scythe	646,109,281		1	2	2		view	4 years ago
	Christmas tree hat	60,748,989		100,000	150,000	2		view	4 years ago
	Cloak of Seasons	72,218,805		Cannot be alchemised		2		view	4 years ago
	Crown of Seasons	13,148,077		100,000	150,000	2		view	4 years ago
	Fish mask	1,726,295		180,000	270,000	2		view	4 years ago
	Holly wreath	2,140,195,063		1	2	2		view	4 years ago
	Off-hand rubber turkey	610,366		1	2	2		view	4 years ago
	Rubber turkey	428,201		1	2	2		view	4 years ago

29 September 2012

Adjusted index: Discontinued Rare Index Adjustment date: 29 September 2012 Affected templates: Template:GE Discontinued Rare Index and Template:GE Discontinued Rare Index/Diff Added item(s): Fish mask Removed item(s): None Items before adjustment: 15 Items after adjustment: 16 Divisor before adjustment: 15.0000 Divisor after adjustment: 15.0826 Item Base date Base price Price on adjustment date Comments Christmas cracker 31 December 2008 688,800,000 2,146,908,554 Unchanged Blue partyhat 340,100,000 2,147,483,647 Green partyhat 114,800,000 1,124,859,082 Purple partyhat 83,100,000 895,254,988 Red partyhat 129,400,000 1,232,179,013 White partyhat 183,300,000 1,652,939,303 Yellow partyhat 96,300,000 948,567,763 Pumpkin 5,300,000 165,935,075 Easter egg 4,300,000 56,837,419 Blue h'ween mask 12,800,000 112,172,382 Green h'ween mask 10,600,000 90,439,249 Red h'ween mask 17,300,000 149,074,067 Santa hat 14,800,000 116,884,816 Disk of returning 4,700,000 171,076,782 Half full wine jug 31,100,000 261,000,577 Fish mask – – 4,555,462 Added item Calculations From the old divisor obtained from the templates: ${div}_{\text{old}} = 15.0000$ 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: $\begin{align} \sum \left ( \frac{p}{q} \right )_{\text{old}} & = \text{sum of ratios prior to change} \\ & = \frac{2,146,908,554}{688,800,000} + \frac{2,147,483,647}{340,100,000} + \frac{1,124,859,082}{114,800,000} + \dots + \frac{261,000,577}{31,100,000} \\ & = 181.52107486 \text{ (up to 8 d.p.)} \end{align}$ And also: $\begin{align} \sum \left ( \frac{p}{q} \right )_{\text{new}} & = \text{sum of ratios prior to change} - \text{sum of removed ratios} + \text{sum of added ratios} \\ & = \sum \left ( \frac{p}{q} \right )_{\text{old}} - \text{sum of removed ratios} + \text{number of added items} \\ & = 181.52107486 - 0 + 1 \\ & = 182.52107486 \text{ (up to 8 d.p.)} \end{align}$ Thus, the new divisor is: $\begin{align} {div}_{\text{new}} & = {div}_{\text{old}} \times \frac{\sum \left ( \frac{p}{q} \right )_{\text{new}}}{\sum \left ( \frac{p}{q} \right )_{\text{old}}} \\ & = 15.0000 \times \frac{182.52107486}{181.52107486} \\ & = 15.0826 \text{ (4 d.p.)} \end{align}$

20 January 2013

Adjusted index: Discontinued Rare Index Adjustment date: 20 January 2013 Affected templates: Template:GE Discontinued Rare Index and Template:GE Discontinued Rare Index/Diff Added item(s): Christmas tree hat Removed item(s): None Items before adjustment: 16 Items after adjustment: 17 Divisor before adjustment: 15.0826 Divisor after adjustment: 15.1547 Item Base date Base price Price on adjustment date Comments Christmas cracker 31 December 2008 688,800,000 2,147,476,523 Unchanged Blue partyhat 340,100,000 2,147,483,647 Green partyhat 114,800,000 1,439,919,758 Purple partyhat 83,100,000 1,194,593,128 Red partyhat 129,400,000 1,588,813,583 White partyhat 183,300,000 2,115,586,339 Yellow partyhat 96,300,000 1,288,308,900 Pumpkin 5,300,000 153,543,323 Easter egg 4,300,000 73,851,614 Blue h'ween mask 12,800,000 130,080,270 Green h'ween mask 10,600,000 107,141,857 Red h'ween mask 17,300,000 168,034,752 Santa hat 14,800,000 130,038,816 Disk of returning 4,700,000 193,631,082 Half full wine jug 31,100,000 282,814,298 Fish mask 29 September 2012 4,555,462 1,778,504 Christmas tree hat – – 2,295,576 Added item Calculations From the old divisor obtained from the templates: ${div}_{\text{old}} = 15.0826$ 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: $\begin{align} \sum \left ( \frac{p}{q} \right )_{\text{old}} & = \text{sum of ratios prior to change} \\ & = \frac{2,146,908,554}{688,800,000} + \frac{2,147,483,647}{340,100,000} + \frac{1,439,919,758}{114,800,000} + \dots + \frac{1,778,504}{4,555,462} \\ & = 209.14534690 \text{ (up to 8 d.p.)} \end{align}$ And also: $\begin{align} \sum \left ( \frac{p}{q} \right )_{\text{new}} & = \text{sum of ratios prior to change} - \text{sum of removed ratios} + \text{sum of added ratios} \\ & = \sum \left ( \frac{p}{q} \right )_{\text{old}} - \text{sum of removed ratios} + \text{number of added items} \\ & = 209.14534690 - 0 + 1 \\ & = 210.14534690 \text{ (up to 8 d.p.)} \end{align}$ Thus, the new divisor is: $\begin{align} {div}_{\text{new}} & = {div}_{\text{old}} \times \frac{\sum \left ( \frac{p}{q} \right )_{\text{new}}}{\sum \left ( \frac{p}{q} \right )_{\text{old}}} \\ & = 15.0826 \times \frac{210.14534690}{209.14534690} \\ & = 15.1547 \text{ (4 d.p.)} \end{align}$

23 July 2013

Adjusted index: Discontinued Rare Index Adjustment date: 23 July 2013 Affected templates: Template:GE Discontinued Rare Index and Template:GE Discontinued Rare Index/Diff Added item(s): Crown of Seasons Removed item(s): None Items before adjustment: 17 Items after adjustment: 18 Divisor before adjustment: 15.1547 Divisor after adjustment: 15.2129 Item Base date Base price Price on adjustment date Comments Christmas cracker 31 December 2008 688,800,000 2,147,483,557 Unchanged Blue partyhat 340,100,000 2,147,483,647 Green partyhat 114,800,000 1,845,813,270 Purple partyhat 83,100,000 1,514,338,96 Red partyhat 129,400,000 2,100,264,784 White partyhat 183,300,000 2,147,483,598 Yellow partyhat 96,300,000 1,607,195,89 Pumpkin 5,300,000 177,606,966 Easter egg 4,300,000 82,884,794 Blue h'ween mask 12,800,000 169,489,376 Green h'ween mask 10,600,000 129,808,159 Red h'ween mask 17,300,000 234,599,317 Santa hat 14,800,000 149,818,733 Disk of returning 4,700,000 226,927,013 Half full wine jug 31,100,000 320,604,356 Fish mask 29 September 2012 4,555,462 1,446,274 Christmas tree hat 20 January 2013 2,295,576 26,024,637 Crown of Seasons – – 8,307,542 Added item Calculations From the old divisor obtained from the templates: ${div}_{\text{old}} = 15.1547$ 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: $\begin{align} \sum \left ( \frac{p}{q} \right )_{\text{old}} & = \text{sum of ratios prior to change} \\ & = \frac{2,147,483,557}{688,800,000} + \frac{2,147,483,647}{340,100,000} + \frac{1,845,813,270}{114,800,000} + \dots + \frac{26,024,637}{2,295,576} \\ & = 260.57227963 \text{ (up to 8 d.p.)} \end{align}$ And also: $\begin{align} \sum \left ( \frac{p}{q} \right )_{\text{new}} & = \text{sum of ratios prior to change} - \text{sum of removed ratios} + \text{sum of added ratios} \\ & = \sum \left ( \frac{p}{q} \right )_{\text{old}} - \text{sum of removed ratios} + \text{number of added items} \\ & = 260.57227963 - 0 + 1 \\ & = 261.57227963 \text{ (up to 8 d.p.)} \end{align}$ Thus, the new divisor is: $\begin{align} {div}_{\text{new}} & = {div}_{\text{old}} \times \frac{\sum \left ( \frac{p}{q} \right )_{\text{new}}}{\sum \left ( \frac{p}{q} \right )_{\text{old}}} \\ & = 15.1547 \times \frac{261.57227963}{260.57227963} \\ & = 15.2129 \text{ (4 d.p.)} \end{align}$

20 January 2014

Adjusted index: Discontinued Rare Index Adjustment date: 20 January 2014 Affected templates: Template:GE Discontinued Rare Index and Template:GE Discontinued Rare Index/Diff Added item(s): Black Santa hat Removed item(s): None Items before adjustment: 18 Items after adjustment: 19 Divisor before adjustment: 15.2129 Divisor after adjustment: 15.2787 Item Base date Base price Price on adjustment date Comments Christmas cracker 31 December 2008 688,800,000 2,147,483,632 Unchanged Blue partyhat 340,100,000 2,147,483,647 Green partyhat 114,800,000 1,490,829,327 Purple partyhat 83,100,000 1,279,369,134 Red partyhat 129,400,000 1,696,893,747 White partyhat 183,300,000 2,146,833,194 Yellow partyhat 96,300,000 1,335,202,311 Pumpkin 5,300,000 174,290,712 Easter egg 4,300,000 70,272,905 Blue h'ween mask 12,800,000 132,769,255 Green h'ween mask 10,600,000 110,890,723 Red h'ween mask 17,300,000 185,134,793 Santa hat 14,800,000 135,913,306 Disk of returning 4,700,000 223,384,911 Half full wine jug 31,100,000 333,709,743 Fish mask 29 September 2012 4,555,462 944,822 Christmas tree hat 20 January 2013 2,295,576 12,593,302 Crown of Seasons 23 July 2013 8,307,542 3,926,892 Black Santa hat – – 222,967,707 Added item Calculations From the old divisor obtained from the templates: ${div}_{\text{old}} = 15.2129$ 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: $\begin{align} \sum \left ( \frac{p}{q} \right )_{\text{old}} & = \text{sum of ratios prior to change} \\ & = \frac{2,147,483,557}{688,800,000} + \frac{2,147,483,647}{340,100,000} + \frac{1,490,829,327}{114,800,000} + \dots + \frac{12,593,302}{2,295,576} + \frac{3,926,892}{8,307,542} \\ & = 230.87579845 \text{ (up to 8 d.p.)} \end{align}$ And also: $\begin{align} \sum \left ( \frac{p}{q} \right )_{\text{new}} & = \text{sum of ratios prior to change} - \text{sum of removed ratios} + \text{sum of added ratios} \\ & = \sum \left ( \frac{p}{q} \right )_{\text{old}} - \text{sum of removed ratios} + \text{number of added items} \\ & = 230.87579845 - 0 + 1 \\ & = 231.87579845 \text{ (up to 8 d.p.)} \end{align}$ Thus, the new divisor is: $\begin{align} {div}_{\text{new}} & = {div}_{\text{old}} \times \frac{\sum \left ( \frac{p}{q} \right )_{\text{new}}}{\sum \left ( \frac{p}{q} \right )_{\text{old}}} \\ & = 15.2129 \times \frac{231.87579845}{230.87579845} \\ & = 15.2787 \text{ (4 d.p.)} \end{align}$

19 June 2014

Adjusted index: Discontinued Rare Index Adjustment date: 19 June 2014 Affected templates: Template:GE Discontinued Rare Index and Template:GE Discontinued Rare Index/Diff Added item(s): Cloak of Seasons Removed item(s): None Items before adjustment: 19 Items after adjustment: 20 Divisor before adjustment: 15.2787 Divisor after adjustment: 15.3476 Item Base date Base price Price on adjustment date Comments Christmas cracker 31 December 2008 688,800,000 2,147,483,644 Unchanged Blue partyhat 340,100,000 2,147,483,647 Green partyhat 114,800,000 1,512,978,741 Purple partyhat 83,100,000 1,242,748,792 Red partyhat 129,400,000 1,706,390,538 White partyhat 183,300,000 2,147,481,758 Yellow partyhat 96,300,000 1,325,097,236 Pumpkin 5,300,000 157,608,053 Easter egg 4,300,000 62,666,643 Blue h'ween mask 12,800,000 121,249,470 Green h'ween mask 10,600,000 98,258,298 Red h'ween mask 17,300,000 170,663,885 Santa hat 14,800,000 125,533,632 Disk of returning 4,700,000 211,466,440 Half full wine jug 31,100,000 348,603,157 Fish mask 29 September 2012 4,555,462 669,574 Christmas tree hat 20 January 2013 2,295,576 12,559,556 Crown of Seasons 23 July 2013 8,307,542 4,555,009 Black Santa hat 20 January 2013 222,967,707 410,924,805 Cloak of Seasons – – 7,614,236 Added item Calculations From the old divisor obtained from the templates: ${div}_{\text{old}} = 15.2787$ 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: $\begin{align} \sum \left ( \frac{p}{q} \right )_{\text{old}} & = \text{sum of ratios prior to change} \\ & = \frac{2,147,483,644}{688,800,000} + \frac{2,147,483,647}{340,100,000} + \frac{1,512,978,741}{114,800,000} + \dots + \frac{4,555,009}{8,307,542} + \frac{410,924,805}{222,967,707} \\ & = 221.84047459 \text{ (up to 8 d.p.)} \end{align}$ And also: $\begin{align} \sum \left ( \frac{p}{q} \right )_{\text{new}} & = \text{sum of ratios prior to change} - \text{sum of removed ratios} + \text{sum of added ratios} \\ & = \sum \left ( \frac{p}{q} \right )_{\text{old}} - \text{sum of removed ratios} + \text{number of added items} \\ & = 221.84047459 - 0 + 1 \\ & = 222.84047459 \text{ (up to 8 d.p.)} \end{align}$ Thus, the new divisor is: $\begin{align} {div}_{\text{new}} & = {div}_{\text{old}} \times \frac{\sum \left ( \frac{p}{q} \right )_{\text{new}}}{\sum \left ( \frac{p}{q} \right )_{\text{old}}} \\ & = 15.2787 \times \frac{222.84047459}{221.84047459} \\ & = 15.3476 \text{ (4 d.p.)} \end{align}$

30 December 2014

Adjusted index: Discontinued Rare Index Adjustment date: 30 December 2014 Affected templates: Template:GE Discontinued Rare Index and Template:GE Discontinued Rare Index/Diff Added item(s): Rubber turkey, Off-hand rubber turkey, Christmas scythe, Holly wreath Removed item(s): None Items before adjustment: 20 Items after adjustment: 24 Divisor before adjustment: 15.3476 Divisor after adjustment: 15.6373 Item Base date Base price Price on adjustment date Comments Christmas cracker 31 December 2008 688,800,000 2,147,483,644 Unchanged Blue partyhat 340,100,000 2,147,483,647 Green partyhat 114,800,000 1,452,340,733 Purple partyhat 83,100,000 1,233,390,908 Red partyhat 129,400,000 1,738,594,833 White partyhat 183,300,000 2,147,483,644 Yellow partyhat 96,300,000 1,314,553,072 Pumpkin 5,300,000 149,804,919 Easter egg 4,300,000 49,183,614 Blue h'ween mask 12,800,000 101,362,653 Green h'ween mask 10,600,000 82,685,014 Red h'ween mask 17,300,000 132,872,973 Santa hat 14,800,000 115,823,577 Disk of returning 4,700,000 200,971,362 Half full wine jug 31,100,000 348,603,157 Fish mask 29 September 2012 4,555,462 601,926 Christmas tree hat 20 January 2013 2,295,576 12,651,188 Crown of Seasons 23 July 2013 8,307,542 4,044,842 Black Santa hat 20 January 2013 222,967,707 340,890,058 Cloak of Seasons 19 June 2014 7,614,236 27,631,528 Rubber turkey – – 4,140,748 Added item Off-hand rubber turkey 3,590,829 Christmas scythe 72,191,580 Holly wreath 372,492,991 Calculations From the old divisor obtained from the templates: ${div}_{\text{old}} = 15.3476$ 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: $\begin{align} \sum \left ( \frac{p}{q} \right )_{\text{old}} & = \text{sum of ratios prior to change} \\ & = \frac{2,147,483,644}{688,800,000} + \frac{2,147,483,647}{340,100,000} + \frac{1,452,340,733}{114,800,000} + \dots + \frac{340,890,058}{222,967,707} + \frac{27,631,528}{7,614,236} \\ & = 211.91329563 \text{ (up to 8 d.p.)} \end{align}$ And also: $\begin{align} \sum \left ( \frac{p}{q} \right )_{\text{new}} & = \text{sum of ratios prior to change} - \text{sum of removed ratios} + \text{sum of added ratios} \\ & = \sum \left ( \frac{p}{q} \right )_{\text{old}} - \text{sum of removed ratios} + \text{number of added items} \\ & = 211.91329563 - 0 + 4 \\ & = 215.91329563 \text{ (up to 8 d.p.)} \end{align}$ Thus, the new divisor is: $\begin{align} {div}_{\text{new}} & = {div}_{\text{old}} \times \frac{\sum \left ( \frac{p}{q} \right )_{\text{new}}}{\sum \left ( \frac{p}{q} \right )_{\text{old}}} \\ & = 15.3476 \times \frac{215.91329563}{211.91329563} \\ & = 15.6373 \text{ (4 d.p.)} \end{align}$