For example, the Invesco S&P 500® Equal Weight ETF (RSP) follows the S&P 500 Equal Weight Index (EWI). “They focus on one thing at a time and buy and then change their mind and sell.” Rising crude oil prices and ongoing supply chain disruptions have weighed on businesses and consumers in the run-up to quarterly reports. "We have had a good run here (year-to-date) so you can get continued back and forth across the markets, a lot of it is going to be this push and pull between inflation expectations, and potentially the dampening of growth," Martin added.