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How are these numbers calculated? It doesn't make sense to me. There are apparently 2 different indices NDX: NASDAQ 100 Index 2021-04-27 13960 2021-04-28 13

How are these numbers calculated? It doesn't make sense to me. There are apparently 2 different indices NDX: NASDAQ 100 Index 2021-04-27 13960 2021-04-28 13902 2021-04-29 13970 2022-04-28 13456 2022-04-29 12854 https://finance.yahoo.com/quote/%5ENDX/chart https://finance.yahoo.com/quote/%5ENDX/chart XNDX: NASDAQ-100 Total Return 2021-04-27 16360 2021-04-28 16291 2021-04-29 16372 2022-04-28 15880 (matches your [1]) 2022-04-29 15170 https://www.barchart.com/stocks/quotes/$XNDX/interactive-chart https://www.barchart.com/stocks/quotes/$XNDX/interactive-cha... I can't figure out what the difference is between them. QQQ is a fund that tracks one of them, but I don't know which. It apparently all 3 match very closely: https://seekingalpha.com/symbol/XNDX/charting?compare=XNDX,QQQ,NDX&interval=1Y https://seekingalpha.com/symbol/XNDX/charting?compare=XNDX,Q... QQQ's "1-Year Daily Total Return" is -6.78% and its "1-Year" "Trailing Returns" "Monthly Total Returns" is 9.54%. How come those numbers are so different? Shouldn't they be essentially the same? These other sites say QQQ's "1 Year Return" is -2.78%. https://www.bloomberg.com/quote/QQQ:US https://www.bloomberg.com/quote/QQQ:US https://etfdb.com/etf/QQQ/#performance https://etfdb.com/etf/QQQ/#performance I don't understand any of these numbers. How can this stuff be so contradictory?

scrlk 5y ago
NDX = capitalization-weighted index (i.e. the higher marker cap companies in the index will be a greater % of the index) [1] XNDX = a total return index tracks the price + reinvests all dividends back in to the index [2] [1] https://www.investopedia.com/terms/n/nasdaqcompositeindex.asp https://www.investopedia.com/terms/n/nasdaqcompositeindex.as... [2] https://www.investopedia.com/terms/t/total_return_index.asp https://www.investopedia.com/terms/t/total_return_index.asp
actuallyalys 5y ago
I believe total return includes dividends. So QQQQ's price tracks the index, but your total return for QQQQ (i.e., increases in value plus dividends paid out to you) would track, well, the total returns. Not sure why different sites don't align.

scrlk 5y ago

NDX = capitalization-weighted index (i.e. the higher marker cap companies in the index will be a greater % of the index) [1] XNDX = a total return index tracks the price + reinvests all dividends back in to the index [2] [1] https://www.investopedia.com/terms/n/nasdaqcompositeindex.asp https://www.investopedia.com/terms/n/nasdaqcompositeindex.as... [2] https://www.investopedia.com/terms/t/total_return_index.asp https://www.investopedia.com/terms/t/total_return_index.asp

actuallyalys 5y ago

I believe total return includes dividends. So QQQQ's price tracks the index, but your total return for QQQQ (i.e., increases in value plus dividends paid out to you) would track, well, the total returns. Not sure why different sites don't align.