Marvell Short Sellers Pile in as Stock's 250% Rally Tests Resistance

$Marvell Technology(MRVL)$   short sellers piled onto the best performing semiconductor stock over the past five days as shares tested historical resistance levels after the company saw its market capital soar by $85 billion in the first three days of this week. 

Trading in borrowed Marvell shares that were sold short rose to 10.6 million shares Wednesday, from 9.49 million a day earlier. The latest short volume represented 9.1% of the shares that changed hands that day when the stock sealed its five-day 52% run. That surge came after $NVIDIA (NVDA.US)$ CEO Jensen Huang predicted Monday that Marvell could be the next trillion-dollar business during the COMPUTEX 2026 trade show.

The jump in short volume, or bets that a stock price will fall, indicates that traders could be bracing for a potential pullback. These investors borrow shares to sell them, hoping to repurchase them later at a lower price.

Huang's endorsement of Marvell caused the rapid price appreciation that left the stock in a vulnerable technical position. By Thursday morning, 12 of the 15 most commonly used technical indicators on the moomoo platform shows the asset could be severely overbought, according to both the KDJ and RSI, or Relative Strength Index, indicators.

An overbought reading suggests the price has risen too quickly, which often precedes a cooling-off period. The technical snapshot also notes that the stock tested upper resistance level of $324.20 reached Wednesday.

Recent trade overview data highlights a net outflow of 171.69 million, signaling that large-scale selling pressure is outpacing inflows. This creates a disconnect between the optimistic long-term narrative and the immediate supply of available shares.

The reliance on high-speed networking for artificial intelligence remains a key growth pillar for the company. While analysts expect this sector to expand as data centers require more specialized hardware to manage complex workloads, $Broadcom(AVGO)$  's weaker-than-expected AI chip revenue outlook for its fiscal third quarter fueled the negative sentiment that engulfed the chip sector. 

While the long-term vision is seen as compelling by the 44 the analysts who have a buy recommendation on Marvell, short-term price swings can be extreme when market sentiment shifts away from high-growth technology assets.

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