| Tech stocks volatile as sector rotation goes on |
| HSI to test 24,168 support as tech remains volatile |
| Tech stocks expected to have mixed performance |
| Tech retreating while bank and insurance surged |
| Old-economy stocks rose as sector rotation continued |
| Tech stocks retreated as HSI fell for third day |
| U.S. tech stocks plunged; HSI to test 100-day MA support |
| HSI still range bound while TECH Index set new high |
| HSI more likely to break out upward in Sep |
| HSI yet to confirm breaking out 250-day MA |