Bond market flashes a warning reminiscent of the summer before 1987’s Black Monday, according to Wall Street veteran Larry McDonald
Executive summary: Larry McDonald warned that the bond market is showing a signal similar to that observed in the summer of 1987, before the Black Monday equity crash. The historical parallel raises concern that equity markets could experience heightened volatility or a downturn if the bond‑market signal persists.
Who is involved: Larry McDonald (Wall Street veteran), bond market participants, equity investors.
Likely next: Market participants will monitor bond yields and equity indices for further confirmation of the signal, potentially adjusting portfolios toward defensive positions.
Larry McDonald, a veteran Wall Street analyst, told MarketWatch that the current behaviour of the bond market echoes the pattern observed in the summer of 1987, a period that preceded the sharp equity sell‑off known as Black Monday. According to the same report, the warning signal that appeared in the bond market before that crash is now re‑emerging, although no comparable move has yet occurred in stock indices. The significance of the observation lies in the historical link between bond‑market stress and subsequent equity volatility. Investors who monitor leading indicators may view the renewed bond signal as a cue to reassess exposure to risk assets, potentially tightening portfolio positioning or increasing hedges. While the pattern does not guarantee a repeat of 1987, market participants are likely to watch the bond sector closely in the coming weeks; if the signal persists, it could contribute to heightened scrutiny of equity valuations and a greater focus on risk‑management strategies.
What's next — scenarios
Base Case: Yield Curve Normalization and Minor Correction (50%)
Expect heightened equity volatility and higher hedging costs for corporate cash over the next quarter.
- Bond yields stabilize without triggering a major equity sell-off
- Credit spreads remain relatively tight
Downside: 1987-Style Liquidity Crunch (30%)
Liquidity constraints will drive up borrowing costs and force immediate deleveraging across corporate portfolios.
- Rapid inversion or steepening of the yield curve accompanied by a sudden equity drop exceeding 5%
- Spike in short-term interbank funding rates
Upside: False Alarm and Equity Melt-Up (20%)
Bond market signals prove mistimed, allowing for aggressive equity exposure and favorable debt refinancing windows.
- Sustained equity market rally despite bond market anomalies
- Central bank verbal intervention or policy pivot soothing debt markets
What to watch
- US Treasury yield curve behavior over the next 30 days
- CBOE Volatility Index (VIX) movements through the end of the quarter
- Corporate debt issuance spreads in the upcoming 60-day window
- Federal Reserve commentary on market liquidity within the next 45 days
Timeline
- — Black Monday’s stock-market warning signal came from the bond market, and it’s back, says Wall Street veteran (MarketWatch)
Analysis — what this means
Sectors affected
- Equities
- Bond market
Historical parallels
- Black Monday 1987 stock market crash
Key entities
Sources
- Black Monday’s stock-market warning signal came from the bond market, and it’s back, says Wall Street veteran — MarketWatch