Susquehanna options strategist Alison Edwards notes call buying activity in rarely traded Quanta Services (NYSE: PWR), as an investor purchased ~5.5k Aug 35 Calls. The trading created ~185k shares to buy vs. ~200k on the tape at the time. Ahead of earnings tomorrow, the implied move is ~7% vs. the historical realized average move over past 8Qs of ~3.5%.