The Wall Street Converter
Guides, explainers, and insights on converting between stock market indices, futures contracts, and ETFs.
VIX and SPY move in opposite directions roughly 75–80% of trading days. Learn how VIX levels map to SPY options premiums, when elevated fear signals a buying opportunity, and how to use the VIX–SPY relationship to time your spreads.
Read More →ES futures trade on CME Globex nearly 24 hours a day — Sunday 6:00 PM ET through Friday 5:00 PM ET. Get the complete session schedule, the daily maintenance break, RTH vs Globex differences, and what the overnight session means for SPY traders.
Read More →Triple witching falls on March 20, June 19, September 18, and December 18 in 2026. Learn how ES futures settle via the SOQ, how SPX and SPY options expire differently, and when to roll before each event.
Read More →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 →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 →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 →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 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 →How YM (E-mini Dow futures) relates to the DJIA and DIA ETF. Includes conversion ratios, contract specs, and practical examples for Dow traders.
Read More →How RTY (E-mini Russell 2000 futures) relates to the RUT index and IWM ETF. Includes conversion ratios, contract specs, and practical examples for small-cap traders.
Read More →How NQ (E-mini Nasdaq 100 futures) relates to NDX and QQQ. Includes the ~40:1 conversion ratio, contract specs, and practical examples for Nasdaq traders.
Read More →SPX index options qualify for Section 1256 tax treatment — 60% long-term, 40% short-term gains regardless of hold time. Here's exactly how much you save versus trading SPY options.
Read More →ES futures typically trade at a small premium above SPX due to cost of carry — interest rates minus dividend yield. Learn the fair value formula, how to calculate the basis, and what it means for reading pre-market direction.
Read More →How to read pre-market ES and NQ futures to predict the market open. Learn the implied open formula, key time windows from overnight to 9:30 AM ET, and the common mistakes traders make before the bell.
Read More →Convert any SPX option strike to its SPY equivalent using the live ratio. Covers contract size differences, European vs. American exercise, 60/40 tax treatment, and when to use SPX, SPY, or XSP options.
Read More →Futures basis is the gap between ES and SPX driven by cost of carry — financing rate minus dividend yield. Learn the fair value formula, how basis decays to zero at expiration, what the roll costs you, and how to strip out carry to read pre-market direction correctly.
Read More →When stock markets close, ES futures are the instrument to monitor — not SPY. Learn the overnight instrument hierarchy, which time windows carry genuine signal, and how to translate ES prices into SPY for accurate after-hours risk management.
Read More →SPY was designed to trade at 1/10 of SPX, but the ratio drifts over time due to the 0.0945% expense ratio, dividend cash drag from SPY's Unit Investment Trust structure, and index rebalancing timing. Learn exactly why and when it matters.
Read More →Compare contract size, margin requirements, liquidity, and tax treatment across MES ($5/pt), ES ($50/pt), and SPY shares. Includes hedge sizing math and a practical decision framework for small-account traders and hedgers.
Read More →ES futures expire the third Friday of March, June, September, and December. Learn the 8-day roll window, how the calendar spread is priced from cost of carry, and what rolling costs you versus holding SPY.
Read More →Authorized participants use the ETF creation/redemption mechanism to keep SPY's price within 0.05% of SPX at all times. Learn how this arbitrage works step by step — and when it can temporarily break down.
Read More →SPX and SPY options carry structurally different implied volatility — SPY IV runs 0.5–2 vol points above equivalent SPX due to American exercise risk and dividends. Learn why VIX doesn't directly measure SPY volatility and how it affects your options strategies.
Read More →ES futures settle at a 30-second VWAP at 3:00 PM CT — not the SPX closing print. Learn how CME calculates the daily mark, why it differs from the cash index close, and what it means for your P&L and SPY hedge accuracy.
Read More →At SPX 5,500, one ES contract controls $275,000 in notional value — equivalent to roughly 500 shares of SPY. Walk through the exact math, see how it changes with market levels, and learn how to size your hedge using ES or MES contracts.
Read More →At 9:30 AM ET, SPX prints its first tick from individual stock opening auctions — not from ES. Learn why the cash index diverges from ES futures at the open, how the fair value formula predicts the gap, and what forces convergence within seconds.
Read More →Equity index futures almost always trade in contango — futures above spot — because interest rates exceed dividend yields. Learn when backwardation occurs, how ES, NQ, and RTY differ in their carry premiums, and what rolling costs you each quarter.
Read More →NQ futures carry a $20/point multiplier and QQQ tracks NDX at 1/40th the index level. Learn the exact conversion formula, why one NQ contract always equals 800 QQQ shares, and how to size hedges between Nasdaq futures and the ETF.
Read More →SPX closes Friday but ES futures keep trading until Sunday 5 PM ET and reopen Sunday at 6 PM — repricing every weekend news event before Monday's bell. Learn how the mechanical gap forms, how to read Sunday evening ES prices, and what the academic "weekend effect" actually means for modern markets.
Read More →SPX 0DTE options are cash-settled, 10× larger per contract than SPY, and qualify for the 60/40 Section 1256 tax treatment. SPY 0DTE options are physically settled and sized for smaller accounts. Here's how to choose.
Read More →XSP tracks 1/10th of the S&P 500 at SPY-like price levels — but keeps SPX's structural advantages: European exercise, cash settlement, and 60/40 Section 1256 tax treatment. Here's how XSP compares to SPX and SPY options.
Read More →Need to convert between index, futures, and ETF prices?
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