Because that's about the time when the margin calls for the day are paid up for the traders who have lost money long in TECH shares. They have to either come up with the money to hold the stock or sell and take the loss. That's putting early pressure on the Nasdaq here.
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And between 10h35 / 11h15 is also an intraday market reversal time
This is generally the final major time frame of morning trading, this time involves less risk
