The six‑month window after mid‑July 2022 runs roughly from 14 July 2022 to 14 January 2023. During that period, at least one additional frontier/emerging market did in fact suffer a Sri Lanka‑style sovereign crisis.

Ghana as a “domino”

Ghana is widely treated by index providers and financial media as a frontier / lower‑tier emerging market; for example, S&P Dow Jones and Russell classify Ghana as a frontier market. (es.wikipedia.org)

By late 2022 Ghana was experiencing its worst economic crisis in decades, with a collapsing currency, very high inflation and severe debt distress. In July 2022 the government formally requested IMF assistance as fiscal and external imbalances became unsustainable. (mofep.gov.gh)

On 5 December 2022, Ghana launched a Domestic Debt Exchange Programme explicitly "to manage public debt and prevent the further financial collapse of the Ghanaian economy." (en.wikipedia.org) Then on 19 December 2022—well within six months of mid‑July—Ghana’s finance ministry announced a “suspension of all debt service payments” on major categories of its external debt (Eurobonds, commercial loans and most bilateral debt), describing the country as facing a “major economic and financial crisis” and acknowledging that its public debt was unsustainable. (mofep.gov.gh)

News outlets and analysts treated this move as an effective sovereign default: Reuters and Al Jazeera reported that Ghana had suspended payments on most external debt, effectively defaulting, amid a balance‑of‑payments hole, soaring inflation (around or above 50%) and street protests, and later commentary refers to Ghana’s December 2022 default as a landmark African sovereign default. (aljazeera.com) Subsequent IMF and restructuring programs explicitly frame Ghana’s situation as a full‑blown sovereign debt crisis. (reuters.com)

Comparison to Sri Lanka and timing

Sri Lanka’s 2022 episode combined an external‑debt default, currency collapse, shortages of essentials, IMF involvement and deep political turmoil—a template many analysts described as a “canary in the coal mine” and a first “domino” for other heavily indebted emerging/frontier economies such as Ghana, Egypt, Tunisia and Pakistan. (en.wikipedia.org) Ghana’s December 2022 crisis shares the core features of this pattern: an unsustainable external‑debt burden, suspension of most external debt service (default), an IMF rescue framework, sharply deteriorating living standards and social unrest.

Because Ghana—an archetypal frontier/emerging market—suffered a Sri Lanka‑style sovereign debt and balance‑of‑payments crisis within five months of mid‑July 2022, Jason’s prediction that there would be “other dominoes” among frontier/emerging markets in the subsequent six months is borne out by events.