{"id":14252,"date":"2026-05-27T07:39:57","date_gmt":"2026-05-27T07:39:57","guid":{"rendered":"https:\/\/lemonn.co.in\/blog\/glossary\/pair-trading\/"},"modified":"2026-05-27T07:39:57","modified_gmt":"2026-05-27T07:39:57","slug":"pair-trading","status":"publish","type":"glossary","link":"https:\/\/lemonn.co.in\/blog\/glossary\/pair-trading\/","title":{"rendered":"Pair Trading"},"content":{"rendered":"

Pair trading<\/a> is a market-neutral trading<\/a> strategy that involves simultaneously buying one security and short-selling a closely related (correlated) security when their price relationship diverges from its historical average. The goal is to profit when the price relationship reverts to normal, regardless of the overall market direction.<\/p>\n

What Is Pair Trading?<\/h2>\n

Pair trading is based on the idea that certain stocks<\/a> or assets<\/a> tend to move together because of fundamental relationships: two companies in the same sector<\/a>, a company and its ADR, or two commodities used in the same industry.<\/p>\n

When the price ratio or spread between the two diverges significantly from its historical average, the trader goes:
\n– Long (buys) the underperforming security
\n– Short (sells) the outperforming security<\/p>\n

When the spread normalises, both positions are closed for a profit.<\/p>\n

How Pair Trading Works<\/h2>\n

**Step 1**: Identify two securities with high historical correlation (e.g., SBI and HDFC Bank).<\/p>\n

**Step 2**: Track the price ratio (SBI price \/ HDFC Bank price) over time. Calculate the mean and standard deviation.<\/p>\n

**Step 3**: When the ratio is 2 standard deviations above the mean, HDFC has outperformed SBI relatively. Short HDFC and buy SBI.<\/p>\n

**Step 4**: Close both positions when the ratio reverts to its mean.<\/p>\n

Why Pair Trading Is Market-Neutral<\/h2>\n

Since you are simultaneously long one stock and short another in the same sector, overall market movements (which affect both stocks similarly) cancel out. Profit comes from the relative movement between the two, not from the market direction.<\/p>\n

Pair Trading in India<\/h2>\n

Pair trading is practiced by hedge fund<\/a>s, proprietary trading desks, and sophisticated retail traders. SEBI<\/a> allows short selling<\/a> in India, making pair trading technically feasible. However, restrictions on shorting smaller stocks limit pair trading to liquid large-caps.<\/p>\n

Risks<\/h2>\n

– The correlation can break down permanently (divergence risk) if one company faces a fundamental change
\n– Short selling costs (borrowing fees) can erode profits
\n– Margin requirements on the short position tie up capital<\/p>\n

Practical Example<\/h2>\n

Infosys and TCS are historically correlated. Their price ratio has averaged 0.7 for 2 years. Due to a temporary Infosys-specific issue, the ratio drops to 0.6. A trader buys 100 Infosys shares<\/a> and shorts 70 TCS shares (to maintain equal rupee exposure). When Infosys recovers and the ratio reverts to 0.68, the trader exits both positions for a net profit<\/a> from the spread convergence.<\/p>\n

Key Takeaways<\/h2>\n

– Pair trading profits from the reversi<\/a>on of price relationships between correlated securities
\n– Market-neutral strategy: overall market direction does not matter; only relative performance matters
\n– Suitable for liquid, highly correlated stocks in the same sector
\n– Risk arises if the correlation breaks down permanently due to fundamental changes in one company
\n– Used by hedge funds, quantitative traders, and sophisticated retail traders with short-selling access<\/p>\n","protected":false},"excerpt":{"rendered":"

Pair trading is a market-neutral trading strategy that involves simultaneously buying one security and short-selling a closely related (correlated) security when their price relationship diverges from its historical average. The goal is to profit when the price relationship reverts to normal, regardless of the overall market direction. What Is Pair Trading? Pair trading is based […]<\/p>\n","protected":false},"author":3,"featured_media":0,"menu_order":0,"template":"","meta":{"_uag_custom_page_level_css":"","footnotes":""},"class_list":["post-14252","glossary","type-glossary","status-publish","hentry"],"blocksy_meta":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"web-stories-poster-portrait":false,"web-stories-publisher-logo":false,"web-stories-thumbnail":false},"uagb_author_info":{"display_name":"Team Lemonn","author_link":"https:\/\/lemonn.co.in\/blog\/author\/ashu\/"},"uagb_comment_info":0,"uagb_excerpt":"Pair trading is a market-neutral trading strategy that involves simultaneously buying one security and short-selling a closely related (correlated) security when their price relationship diverges from its historical average. The goal is to profit when the price relationship reverts to normal, regardless of the overall market direction. What Is Pair Trading? Pair trading is based…","_links":{"self":[{"href":"https:\/\/lemonn.co.in\/blog\/wp-json\/wp\/v2\/glossary\/14252","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lemonn.co.in\/blog\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/lemonn.co.in\/blog\/wp-json\/wp\/v2\/types\/glossary"}],"author":[{"embeddable":true,"href":"https:\/\/lemonn.co.in\/blog\/wp-json\/wp\/v2\/users\/3"}],"version-history":[{"count":0,"href":"https:\/\/lemonn.co.in\/blog\/wp-json\/wp\/v2\/glossary\/14252\/revisions"}],"wp:attachment":[{"href":"https:\/\/lemonn.co.in\/blog\/wp-json\/wp\/v2\/media?parent=14252"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}