Market Research Data

SDS Correlation & Overlap

Fund Strategy Analysis

ProShares UltraShort S&P 500 (SDS) is a key instrument in the Inverse S&P 500 category. As a key Inverse S&P 500 instrument, SDS plays a central role in many portfolios. The metrics below display its historical correlation with other funds to assist in Section 1091 compliance research.

Note: This page summarizes historical similarity metrics and does not assess tax treatment or regulatory outcomes.

Top Correlated ETFs

Inverse S&P 500
SPXU
CORR ≥ 0.99*
>0.99
Correlation
SPXU and SDS share a specific relationship in their market behavior. The key distinction for tax purposes often lies in their divergent index methodologies despite high correlation.
Overlap: < 10%
Yahoo Finance ↗View SPXU Analysis →
SSO
INVERSE
-99.0%
Inverse Correlation
A holdings overlap of roughly <10% suggests that SSO and SDS maintain aligned market exposure. This metric is frequently used to assess the potential for maintaining economic position while realizing a tax loss.
Overlap: < 10%
Yahoo Finance ↗View SSO Analysis →

Note on Overlap: Estimates are based on the most recent publicly disclosed holdings. Leveraged/Inverse products often use swaps resulting in low physical overlap despite high correlation.

Leveraged/Inverse Note: Leveraged ETFs are designed to deliver multiples of daily returns and may experience significant performance divergence over longer periods.

* Correlation calculated using 2-year daily price returns.

Wash Sale Re-Entry Date (Reference Tool)

If you sold SDS at a loss, U.S. wash sale rules generally restrict repurchasing the same or a substantially identical security within 30 days.

*For informational purposes only. Consult a tax professional regarding IRC §1091. This tool calculates the 31st day following a sale.

Thinking of selling SDS?Beta

Avoid the "Cash Trap". Calculate if the tax deduction is worth the risk of missing a market rebound.

Run the Math→

Related ETF Research

VOO MetricsIVV MetricsSPY MetricsQQQ MetricsVTI Metrics

What is Correlation?

Correlation measures the historical relationship between two assets. A value of 1.00 (100%) means they move perfectly in sync. For tax loss harvesting, high correlation is generally desired to stay in the market while realizing a loss.

Index Methodology

Under the wash sale rule, "substantially identical" assets are disallowed for loss claims. Many investors argue that ETFs tracking different indices (e.g., S&P 500 vs. Russell 1000) are not substantially identical.

New Tool

Is a 4% Tax-Free Bond Better than a 7% CD?

Don't guess. Compare municipal bonds against taxable alternatives using your exact 2026 federal and state tax bracket.

Check My Tax-Equivalent Yield →