After four consecutive weeks of negative flows, mutual funds finally enjoyed a week of stellar sales.

Total estimated inflows for the week ended Jan. 9 were $27.47 billion, the Investment Company Institute reported today.

All categories rebounded into the black, with equity funds showing the most improvement. With a stretch of negative flows going back to the week ended May 31, 2011 only interrupted once at the end of February 2012, equity funds finally recovered their groove with to $14.8 billion in inflows. That was up from $11.2 billion in outflows the week prior.

Domestic equity funds broke a 24-week streak of outflows with $8 billion in inflows the week ended Jan. 9, up from $9.6 billion in outflows the week prior. World equity funds have not fared as badly, but also broke a 10-week outflow streak of its own with $6.8 billion in incoming cash, up from $1.5 billion the week prior.

Hybrid funds continued oscillated between negative and positive flows over the past few weeks, but it too enjoyed flows of $2.9 billion.

Bond flows overall have stayed generally positive, and increased to $7.3 billion from $2.1 billion. Of that, taxable bond funds saw estimated inflows of $7.3 billion, while municipal bond funds enjoyed flows of $2.5 billion.

Flow estimates are based on data covering more than 95% of industry assets and are adjusted to represent industry totals.

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