S&P/ASX 200 Index (ASX: XJO) shares are rebounding, currently up 1.4% to 7,449.1 points at the time of writing.
Today's rebound follows a horror day on the market yesterday.
ASX 200 shares fell to their lowest point since December 2023 yesterday, closing 4.23% lower at 7,343.3 points.
Overnight, the S&P 500 Index (SP: .INX) closed 0.23% lower, and the Dow Jones Industrial Average Index (DJX: .DJI) fell 0.91%.
Today's ASX 200 rebound suggests some investors are taking advantage of the market weakness caused by the new US reciprocal tariffs.
Many appear to be buying the dip and/or dollar-cost averaging some of their ASX 200 shares for longer-term gains.
Here are the 10 stocks rising fastest on the market today.

Image source: Getty Images
10 ASX 200 shares leading the rebound
According to the ASX, these shares are rising fastest in today's market rebound.
Block, Inc. (ASX: XYZ)
Block shares are up 11.1% to $85.415 at the time of writing.
There is no company news for this ASX 200 financial share today.
Liontown Resources Limited (ASX: LTR)
The Liontown share price is up 10.3% to 48 cents.
There is no company news for this ASX 200 lithium share today.
Zip Co Limited (ASX: ZIP)
The Zip share price is up 10% to $1.31.
The buy now, pay later company announced an on-market share buyback of up to $50 million today.
The buyback will commence around 23 April and run for up to 12 months.
Zip CEO Cynthia Scott said:
The buy-back program we have announced today is consistent with our capital management framework and focuses on maximising shareholder returns. Zip will maintain a strong balance sheet following completion of the buy-back with ongoing flexibility to pursue future growth opportunities.
Life360 Inc. (ASX: 360)
Life 360 shares are 9.4% higher at $18.31.
There is no company news for this ASX 200 tech share on Tuesday.
PolyNovo Limited (ASX: PNV)
The PolyNovo share price is up 7.4% to $1.05.
The skin regenerative medicine company has not released any news today.
Whitehaven Coal Limited (ASX: WHC)
This ASX 200 coal share is 7.4% higher at $4.67.
There is no company news from Whitehaven today.
Mesoblast Limited (ASX: MSB)
The Mesoblast share price is up 6.8% to $1.725.
The ASX 200 biotech company has not released any news today.
Amotiv Limited (ASX: AOV)
Amotiv shares are up 6.6% to $7.28 apiece.
The auto parts retailer released a presentation relating to its manufacturing facility in Thailand today.
Capstone Copper Corp (ASX: CSC)
This ASX 200 copper stock is trading 6.57% higher at $6.81.
The company announced it will release its 1Q FY25 results on Thursday, 1 May, after the market close.
Pro Medicus Limited (ASX: PME)
This ASX 200 healthcare share is up 6.5% to $188.44.
The ASX 200 healthcare company has not released any news on Tuesday.