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Daily stock rockets & losers; Zip Co rallies over 10% as investors back tech stocks amid US Fed's interest rate hike

Looking at the movers and shakers on the ASX200 today.

Pointsbet is leading the stock rockets today, up almost 12% after lunchtime, despite no price sensitive news released by the online sports betting company.

Zip Co is trading just under 10.5% higher today as investors buy into tech shares following the US Fed?s interest rate hike overnight.

And Polynovo rounds out the top three stock rockets today, up 9.8%.

On the losing front, Graincorp leads the losers today, down 3.5% as some investors take profit from yesterday?s rally.

Whitehaven Coal is trading almost 2.8% lower today.

And Gold Road Resources is trading 2.1% lower after lunchtime as investors sell out of gold mining stocks today.