Folks here need to attend a basic 101 Investing course. "What effect...?" Figure it out: price/share divided by 2, times 2. Duh. No, it doesn't mean the value of the company or your holding go down. There is
merely twice as much stock out there. Splits often come when management sees growth ahead.
Almost in all cases, the stock should go lower and give you an opportunity to buy at lower prices. Not a science but that is what usually happens. Look at the recent split of MA to see this. FCX of 2 years ago. Give it a few weeks and then buy back. JMHO