Author: PK

PK started DQYDJ in 2009 to research and discuss finance and investing and help answer financial questions. He's expanded DQYDJ to build visualizations, calculators, and interactive tools. PK is in his mid-30s and lives in New Hampshire with his wife, kids, and dog.
S&P 500 Profit Margin History

On this page, you'll find an automatically updating history of the S&P 500 profit margin and the profit margin using […]

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S&P 500 Price to Sales Ratio (P/S Ratio)

On this page you'll find the current S&P 500 price to sales ratio (also known as the price to revenue […]

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Bond Convexity Calculator – Estimate a Bond's Price Sensitivity to Interest Rates

On this page is a bond convexity calculator. It will compute a bond's convexity as the second derivative of the bond's […]

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Bond Duration Calculator – Macaulay and Modified Duration

On this page is a bond duration calculator. It will compute the mean bond duration measured in years (the Macaulay […]

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Nikkei Return Calculator, with Dividend Reinvestment

Below is a Nikkei Return calculator with dividend reinvestment, which can compare estimated investment returns. The return calculator can factor in […]

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Salary Percentile Calculator for the United States

Below is a salary percentile calculator for the United States for 2022. Enter a pre-tax or gross salary or wage […]

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Average, Median, Top 1%, and all United States Salary Percentiles

Below are estimated United States salary brackets for 2022. See estimates for the average, median, and top 1% wage or salary […]

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Salary Percentile by Age Calculator for the United States

On this page is a 2022 salary percentile by age calculator with estimates for the United States. Enter an age […]

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Average Salary by Age plus Median, Top 1%, and All Salary Percentiles

In this post are United States Salary Brackets by Age for 2022. You'll also find average salary by age, plus median […]

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Historical 401(k) Contribution Limit

Every year, the IRS sets the maximum 401(k) contribution limits based on inflation (measured by CPI). There are actually multiple […]

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