For the first time in history, <a href="https://en.wikipedia.org/wiki/Price_of_oil" id="mwASg" rel="mw:WikiLink" title="Price of oil">oil prices</a> drop <a href="https://en.wikipedia.org/wiki/Negative_pricing" id="mwASk" rel="mw:WikiLink" title="Negative pricing">below zero</a>, an effect of the <a href="https://en.wikipedia.org/wiki/2020_Russia–Saudi_Arabia_oil_price_war" id="mwASo" rel="mw:WikiLink" title="2020 Russia–Saudi Arabia oil price war">2020 Russia-Saudi Arabia oil price war</a>.<sup about="#mwt95" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-17"}}' id="cite_ref-17" rel="dc:references" typeof="mw:Extension/ref"><a href="./April_20#cite_note-17" id="mwASs" style="counter-reset: mw-Ref 17;"><span class="mw-reflink-text" id="mwASw">[17]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-17"><cite about="#mwt92" class="citation news cs1" id="CITEREFMark_DeCambre2020">Mark DeCambre (April 22, 2020). <a class="external text" href="https://www.marketwatch.com/story/about-150-years-of-oil-price-history-in-one-chart-illustrates-crudes-spectacular-plunge-below-0-a-barrel-2020-04-22" id="mwBhA" rel="mw:ExtLink nofollow">"About 150-years of oil-price history in one chart illustrates crude's spectacular plunge below $0 a barrel"</a>. <i id="mwBhE">Market Watch</i>.</cite><span about="#mwt92" class="Z3988" id="mwBhI" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Market+Watch&amp;rft.atitle=About+150-years+of+oil-price+history+in+one+chart+illustrates+crude%27s+spectacular+plunge+below+%240+a+barrel&amp;rft.date=2020-04-22&amp;rft.au=Mark+DeCambre&amp;rft_id=https%3A%2F%2Fwww.marketwatch.com%2Fstory%2Fabout-150-years-of-oil-price-history-in-one-chart-illustrates-crudes-spectacular-plunge-below-0-a-barrel-2020-04-22&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AApril+20"></span></span>