The S&P BSE Sensex index skyrocketed 14 per cent in April, posting its best monthly return in 11 years, as the equity markets tracked gains in global peers on optimism about a COVID-19 drug to treat the pandemic that has pushed world business into a standstill. Hopes of fiscal stimulus to stem the impact of COVID-19 lockdown on the economy also fuelled the rally in domestic stock markets, say analysts.