The index provider said the UK index fell 1.9% during the month while Canada saw a 3.1% increase.
The All Country World Index (ACWI) meanwhile, returned 0.5%.
The best performing market year to date has been Korea returning 28.9% and the worst Canada, returning 3.5%. This compares to 11.8% returned by the ACWI over the same period.
China has returned 25%, Switzerland 19.1%, France 17.9%, Germany 16%, Japan 10.1% and the UK 10% in the year so far, MSCI added.
The index provider also found the US to be most expensive country with a forward price to earnings of 18.1. The cheapest, Korea, has a forward P/E of 9.4, while for the overall market this stood at 15.9.
The best performing sector in June was financials, returning 4.1%, and the worst was Telecom Services on -2.5%.
For the year to date, information technology has been the top sector with a 20.7% return, while at the other end of the spectrum, energy is the worst, returning -8.3%.
Elsewhere, real estate came out as the most expensive sector with a forward P/E of 28.6 and the cheapest, financials, had a forward P/E of 12.1.