the reviews keep coming in for the inflation reduction act and some analysts now have calculated what the democratic party’s big climate healthcare and tax package could mean for sp 500 companies “based on our analysis the negative impact of the ira act on sp 500 eps is estimated at 45 in 2023” said a jpmorgan team in a note on tuesday referring to fullyear earnings per share for the overall sp 500 which is expected to be well above 200 next year