Correction and editorial revision — 23 October 2026: This retrospective replaces the earlier mixed-time narrative with dated provider observations. The article reported an extreme basis-point move and causal claims without retained input evidence. The earlier causal explanations and trading implications are withdrawn; their removal is not a finding that every cited event was false. The original input file is unavailable. The cutoff below is the calendar day before the original publication date, selected for this reconstruction; it is not a claim about what was known when the original article was written.
This archive review uses observations available in the retrieved daily history on or before 2026-04-10. Each market has its own closing time. The question is: Was the Reported Yield Jump Reproducible?
The measured comparison
The US 10-year yield proxy moved from 4.293% on 2026-04-09 to 4.317% on 2026-04-10. The difference is +0.024 percentage points, or +2.4 basis points. Dividing the change by the earlier yield instead gives +0.56%; that relative change in a yield quote is not a bond investment return. US 10-year yield proxy history.
From 2026-04-02 to 2026-04-10, the proxy changed +0.4 basis points. The daily change is only one part of that interval. The Nasdaq’s latest daily return was +0.35%, and its five-interval return was +4.68%. These measurements do not decompose expected policy rates, inflation expectations, real yields or the term premium. A nominal yield series cannot stand in for all four.
Reproducing the longer comparison
The five-interval baseline is 4.313% on 2026-04-02; the endpoint is 4.317% on 2026-04-10. Subtract the baseline from the endpoint and multiply by 100 to obtain +0.4 basis points. No compounding is needed to express the difference between two yield levels.
Source-linked daily observations
| Series | Previous date | Previous value | Date | Value | Change | Time zone |
|---|---|---|---|---|---|---|
| KOSPI (^KS11) | 2026-04-09 | 5,778.01 | 2026-04-10 | 5,858.87 | +1.40% | Asia/Seoul |
| S&P 500 (^GSPC) | 2026-04-09 | 6,824.66 | 2026-04-10 | 6,816.89 | -0.11% | America/New_York |
| Nasdaq Composite (^IXIC) | 2026-04-09 | 22,822.42 | 2026-04-10 | 22,902.89 | +0.35% | America/New_York |
| US 10-year yield proxy (^TNX) | 2026-04-09 | 4.293 | 2026-04-10 | 4.317 | +2.4 bp | America/Chicago |
| WTI futures (CL=F) | 2026-04-09 | 97.87 | 2026-04-10 | 96.57 | -1.33% | America/New_York |
| Gold futures (GC=F) | 2026-04-09 | 4,818.00 | 2026-04-10 | 4,787.40 | -0.64% | America/New_York |
| USD/KRW (USDKRW=X) | 2026-04-09 | 1,477.60 | 2026-04-10 | 1,473.28 | -0.29% | Europe/London |
| USD/JPY (USDJPY=X) | 2026-04-09 | 158.64 | 2026-04-10 | 159.11 | +0.30% | Europe/London |
| VIX (^VIX) | 2026-04-09 | 19.49 | 2026-04-10 | 19.23 | -1.33% | America/Chicago |
Scope and limitations
Returns are calculated before rounding from Yahoo Finance daily history, not independently verified exchange settlement records. Index values are in points; the yield proxy is quoted in percent; currency quotes are local units per US dollar; gold and WTI futures are dollars per ounce and barrel. Futures-series changes can reflect contract rolls and are not a continuously held contract’s investment return. These are retrospective observations, not live prices or a reconstruction of every intraday quote available to the original author.
For the underlying method, see the trading-session and return guide. This page retains its original address for correction transparency. The title and text now reflect the narrower evidence available; the old URL wording should not be treated as a current claim. No trading instruction is retained.