SPX to SPY Conversion: How the Ratio Works
Understand the precise relationship between the S&P 500 index and its most popular ETF, including why the ratio drifts over time and how to calculate conversions accurately.
Read More →All Articles
Guides, explainers, and insights on converting between stock market indices, futures contracts, and ETFs.
NDX to QQQ: The Nasdaq 100 ETF Ratio
The Nasdaq 100 to QQQ ratio is approximately 38.5:1. Learn how this ratio is determined, why it changes, and how to convert between NDX index points and QQQ share prices.
Read More →Index to ETF Conversion: The Complete Guide
A comprehensive guide covering all major index-to-ETF conversions: SPX/SPY, NDX/QQQ, DJI/DIA, and RUT/IWM. Understand conversion ratios, why they drift, and how to use them.
Read More →ES Futures vs SPX: How E-mini Futures Track the Index
How E-mini S&P 500 futures relate to the SPX index, including basis, fair value, cost of carry, and why prices diverge during different market conditions.
Read More →SPY vs SPX: What Every Trader Should Know
SPY and SPX options are not the same. Learn the key differences in settlement, exercise style, tax treatment under Section 1256, and contract sizing that matter for your trading.
Read More →Need to convert between index, futures, and ETF prices?
Open the Converter →