From the announcement press release:
The S&P/BGCantor U.S. Treasury Inflation Protected Security Index is a broad, comprehensive, market value-weighted index that seeks to measure the performance of the U.S. Treasury Inflation-Protected Securities (TIPS) market.
You can track the index here, but since it just launched on Tuesday, there is very little to see except for the current numbers.
David, with all due respect, facts are better, e.g "but not massive." Really! Don't have to be a political appointee...look…