Now assemble the flows into their most consequential pattern for an emerging-market investor. The central modern fact is this: cross-border capital flows, global credit growth, and risky-asset prices around the world move together, in a single global cycle, driven substantially by US monetary policy and by global risk appetite. This is Hélène Rey's global financial cycle, and it reframes how you think about EM risk.
How does US monetary policy drive capital flows?
The mechanism. When the Fed eases (low rates, QE) and global risk appetite is high, meaning the VIX, the equity-volatility "fear index," is low, the world is awash in cheap dollars hunting for yield. That capital floods out of the low-yielding US and into emerging markets, into Indian, Brazilian and Indonesian stocks and bonds, pushing up EM asset prices, strengthening EM currencies, and fueling EM credit booms. Local conditions barely matter; the tide is global. Then the cycle turns. The Fed tightens, or a shock spikes the VIX, and the process runs violently in reverse. Capital rushes back to the safety and now-higher yield of the dollar; EM currencies and assets sell off together; and the credit boom becomes a bust. Rey's punch line (the impossible trinity dilemma): US monetary policy is, to a large degree, the world's monetary policy. The Fed sets financial conditions for countries that never voted for it, and a floating exchange rate softens but does not sever the link.
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What is a sudden stop?
The sudden stop: the acute failure mode. When the reversal is abrupt, an economy dependent on foreign capital suffers a sudden stop (a term coined by Guillermo Calvo): capital inflows don't just slow, they stop and reverse, almost overnight. The mechanism is a vicious spiral, and you must be able to trace it: (1) foreign capital stops coming and starts leaving; (2) the currency collapses as everyone sells it at once; (3) any debt the country's firms and banks borrowed in dollars now balloons in local-currency terms, so a firm that borrowed $100m when the rupee was 60 now owes far more rupees to repay it (this is the "original sin" of EM dollar debt); (4) balance sheets blow up, banks and firms fail, credit freezes; (5) the central bank, to defend the currency and stem the outflow, is often forced to hike rates into the downturn, the opposite of what the domestic economy needs, deepening the recession. This is the anatomy of Asia 1997 (M7.05), of Latin American crises, and of every EM blow-up: not a deficit per se, but a deficit financed by capital that could, and did, flee. The sudden stop is why the balance of payments insisted that the quality of financing, sticky FDI versus flighty hot money, is the whole game.
What happened in the 2013 taper tantrum?
The 2013 taper tantrum and the "Fragile Five," India included. The cleanest modern illustration, and the one an Indian analyst must know cold. In May 2013, Fed Chair Ben Bernanke merely hinted that the Fed would eventually "taper" (slow) its QE bond-buying. He did not raise rates. He did not even taper yet. He talked about tapering, and that was enough. Long US Treasury yields jumped, the dollar firmed, and the global financial cycle went into reverse: capital fled emerging markets with large current-account deficits and hot-money reliance. Morgan Stanley labeled the five most exposed the "Fragile Five": Brazil, India, Indonesia, South Africa, and Turkey, all running wide current-account deficits, notable inflation, and dependence on foreign portfolio inflows. India was hit hard: the rupee fell roughly 20% in months, from about ₹55 to nearly ₹68/$ by late August 2013, amid a genuine external scare. The response is instructive: Raghuram Rajan, taking over as RBI Governor in September 2013, stabilized the rupee with a targeted FCNR(B) foreign-currency deposit swap window that pulled in ~$26bn of dollar funding, alongside rate hikes and calming communication.
What buffers has India built since 2013?
The buffers India built afterward, and why India is no longer routinely "fragile." The taper tantrum was a national lesson, and India spent the following decade building buffers you should be able to name, because they are exactly what M7.07's dashboard tracks and what makes India's external position far more robust today:
- Reserves. FX reserves rose from ~$275bn in 2013 to roughly $690bn as of mid-2026 , enough to cover ~10–11 months of imports, a formidable war chest to smooth any outflow.
- A narrower current-account deficit. The CAD shrank from a dangerous ~4.8% of GDP in FY13 to a comfortable ~1–1.5%, reducing the amount of foreign capital India needs each year.
- The inflation-targeting framework (2016). Formal flexible inflation targeting (M7.02) anchored inflation and inflation expectations, removing the high-inflation vulnerability that put India on the fragile list.
- A better financing mix. More of the deficit is financed by sticky FDI and stable remittances, less by hot money.
- Bond-index inclusion (JPMorgan GBI-EM, phased from June 2024). Inclusion in global bond indices broadens and stabilizes the foreign investor base for Indian government debt (though it also adds a new channel of index-driven flow sensitivity, a nuance rather than a pure positive).
- A more credible, better-communicating RBI with a demonstrated willingness and capacity to intervene.
State it evenhandedly. India is far more resilient than in 2013 and is generally off the "fragile" lists, but it is not invulnerable, and its single largest residual vulnerability is oil (see commodities as macro signals): a sustained oil spike still widens the CAD, pressures the rupee, and lifts inflation all at once. The buffers reduce the fragility; they do not repeal the global financial cycle.