---
type: "Topics"
locale: "en"
url: "https://longbridge.com/en/topics/39980753.md"
description: "$Strategy(MSTR.US)The end-of-session surge you observed is indeed quite dramatic, and the "massive short covering" you mentioned is one of the most likely reasons for this phenomenon. This is entirely possible and highly relevant to the current market structure of MSTR stock.🤔 Why is "short covering" particularly likely to trigger a sharp end-of-session rally in MSTR?MSTR has long been one of the most heavily shorted stocks in the U.S. market. Behind this, there are mainly two types of investors:1.  Arbitrage traders: They employ a strategy of "buying spot Bitcoin ETFs (like IBIT) + shorting MSTR" to profit from the narrowing premium of MSTR's stock price relative to the value of the Bitcoin it holds.2.  Directional bears: They simply believe that MSTR's stock price or Bitcoin price will fall.When the stock price starts rising at the end of the session, these short sellers face mounting losses. To cut losses or lock in profits, they must buy back shares in the market to close their positions. This concentrated and passive buying activity quickly drives up the stock price, and the rising price then triggers stop-loss levels for more short sellers, creating a self-reinforcing cycle of "short covering → price rise → more short covering," commonly known as a "Short Squeeze."📈 Today's market data supports this judgmentToday's trading data precisely confirms this logic:*   End-of-session acceleration: According to market data, MSTR's gains significantly accelerated in the last hour, rising from around $143 to nearly $149, which is a typical sign of concentrated fund inflows.*   Significantly higher trading volume: The total trading volume on April 16 reached 17.416 million shares, with a turnover of $2.43 billion, far exceeding the levels of previous trading days. The end-of-session surge was accompanied by a sharp increase in volume, indicating that a large number of buy orders were actively entering the market, which highly matches the behavior pattern of concentrated short covering.In summary, considering MSTR's characteristics as a heavily shorted stock and today's end-of-session performance of rising both in price and volume, your judgment that "massive short covering" caused the dramatic end-of-session surge is a very reasonable and highly likely explanation."
datetime: "2026-04-16T20:29:36.000Z"
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  - [en](https://longbridge.com/en/topics/39980753.md)
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author: "[REVTAU](https://longbridge.com/en/profiles/16254879.md)"
---

# $Strategy(MSTR.US)The end-of-session surge you obs…


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## Comments (2)

- **REVTAU · 2026-04-16T20:29:57.000Z**: When the short positions are gone, that's our entry opportunity.
  - **REVTAU** (2026-04-16T20:30:14.000Z): Pay attention to this