<p>You are tracking futures on natural gas. Therefore, the name changes because you look at contracts with different maturities: the <a href="http://finance.yahoo.com/q?s=NGH16.NYM&amp;ql=0" rel="nofollow">first</a> has a maturity in March 2016, whereas the <a href="http://finance.yahoo.com/q?s=NGG16.NYM&amp;ql=0" rel="nofollow">second</a> that you mention is due to expire next month (February 2016).</p>

<p>Future contracts are derivative which reflect accurately the expectations of market participants at a defined maturity. You should try to track <strong>indexes</strong> instead of <strong>futures</strong> if you want to track commodity prices without changing the tickers and without looking too much at expectations.</p>

CC BY-SA 3.0
2016-01-28T16:45:40.403Z
That's a big help thanks. So I need to find out where Yahoo Finance would list a commodity index for Natural Gas, instead of the future I'm currently tracking?
Ian Nebbiolo
CC BY-SA 3.0
2016-01-28T19:22:17.620Z
Yahoo finance seems to be quite poor in commodity indexes. I suggest you try your luck on quandl and use this index for example: https://www.quandl.com/data/WSJ/NG_HH-Natural-Gas-Henry-Hub
Hector
CC BY-SA 3.0
2016-01-28T12:12:17.740Z
2016-01-28T15:42:27.603Z
2016-01-28T15:42:27.603Z
Hector
<p>I'm not entirely sure if I've asked the right question, but does anyone know why certain symbols (I assume they are the symbols) change on NASDAQ?</p>

<p>In particular I'm wanting to keep a track of the Natural Gas price. It's current code is NGH16.NYM and I've been following it here <a href="http://finance.yahoo.com/q?s=NGH16.NYM&amp;ql=0" rel="nofollow">http://finance.yahoo.com/q?s=NGH16.NYM&amp;ql=0</a></p>

<p>However last month the code was NGG16.NYM and had this URL <a href="http://finance.yahoo.com/q?s=NGG16.NYM&amp;ql=0" rel="nofollow">http://finance.yahoo.com/q?s=NGG16.NYM&amp;ql=0</a></p>

<p>I've been struggling with this for a while now, and at first thought it was an incremental code. That pattern didn't seem to stick.</p>

<p>Any ideas? And any idea if I can predict the next ones?</p>

<p>Thanks :)</p>

<stock-market>
Changes to lookup code/symbols on the NASDAQ?
Ian Nebbiolo
# Changes to lookup code/symbols on the NASDAQ?

(Asked by: username_0 on 2016-01-28)

I'm not entirely sure if I've asked the right question, but does anyone know why certain symbols (I assume they are the symbols) change on NASDAQ?

In particular I'm wanting to keep a track of the Natural Gas price. It's current code is NGH16.NYM and I've been following it here <http://finance.yahoo.com/q?s=NGH16.NYM&ql=0>

However last month the code was NGG16.NYM and had this URL <http://finance.yahoo.com/q?s=NGG16.NYM&ql=0>

I've been struggling with this for a while now, and at first thought it was an incremental code. That pattern didn't seem to stick.

Any ideas? And any idea if I can predict the next ones?

Thanks :)

**Tags:** stock-market

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## 1 answers

### Answer by username_1 on 2016-01-28. Score: 4 | Accepted answer

You are tracking futures on natural gas. Therefore, the name changes because you look at contracts with different maturities: the [first](http://finance.yahoo.com/q?s=NGH16.NYM&ql=0) has a maturity in March 2016, whereas the [second](http://finance.yahoo.com/q?s=NGG16.NYM&ql=0) that you mention is due to expire next month (February 2016).

Future contracts are derivative which reflect accurately the expectations of market participants at a defined maturity. You should try to track **indexes** instead of **futures** if you want to track commodity prices without changing the tickers and without looking too much at expectations.

> **Comments:**
> **username_0**: That's a big help thanks. So I need to find out where Yahoo Finance would list a commodity index for Natural Gas, instead of the future I'm currently tracking?  
> **username_1**: Yahoo finance seems to be quite poor in commodity indexes. I suggest you try your luck on quandl and use this index for example: https://www.quandl.com/data/WSJ/NG_HH-Natural-Gas-Henry-Hub  

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