Investors looking to bet on the recovery of the global airline industry have poured hundreds of millions of dollars into a previously small exchange-traded fund over the past three months, bringing its assets under management to almost $1bn.

The US Global Jets ETF held around $33m in assets in early March, according to FactSet, but now holds about $950m. The fund has had net inflows for 62 consecutive trading days, according to FactSet, despite its price falling sharply during that period.