Major economies including Europe, and Japan have witnessed an impressive rebound in growth in 2015. Most of these economies implemented aggressive economic stimulus measures to boost their economies, and it seems that they have started to gain the benefits of these policies. This has resulted in an uptrend of the economies of Europe, Japan, China, and India. Separately, the U.S. economy witnessed a slowdown in the first quarter, and grew only 0.2%. Among others, a stronger dollar, slump in oil prices and a harsh winter were witnessed as main reasons behind the slowdown. In this scenario, investors may find it profitable to invest in non-US mutual funds due to the improving global growth environment.

Below we will share with you 5 top rated non-U.S. mutual funds. Each has earned a Zacks #1 Rank (Strong Buy) as we expect these mutual funds to outperform their peers in the future. To view the Zacks Rank and past performance of all non-U.S. funds, investors can click here to see the complete list of funds.

Thornburg International Value A (TGVAX - MF report) seeks capital growth over the long-run. TGVAX generally invests in securities of countries excluding the U.S. These securities may also include foreign depository receipts. Though TGVAX focuses on acquiring securities of developed nations, it may also invest in securities of developing nations to a lesser extent. The Thornburg International Value A fund returned 17% over the last one year period.

TGVAX has an expense ratio of 1.26% as compared to category average of 1.35%.

Ivy Managed International Opportunities A (IVTAX - MF report) maintains a well-diversified portfolio by investing in foreign stocks as well as bonds through certain Ivy Funds global/international mutual funds. These funds mainly invest in international equity securities, which also include securities from emerging markets. IVTAX may also allocate a smaller potion of its assets in investment grade bonds of foreign companies and governments. The Ivy Managed Intl Opportunities A fund returned 11.3% over the last one year period.

Mike L. Avery is the fund manager and has managed IVTAX since 2007.

FMI International (FMIJX - MF report) seeks long-term capital growth. FMIJX invests a minimum of 65% of its assets in companies that are located outside the U.S. and are believed to be undervalued and having market capitalizations above $5 billion. FMIJX primarily focuses on acquiring equity securities of companies that carries out operations throughout the globe. The FMI International fund returned 13.3% over the last one year period.

As of March 2015, FMIJX held 54 issues with 5.29% of its assets invested in Accenture PLC Class A (ACN).

Lord Abbett International Opportunities A (LAIEX - MF report) primarily invests in stocks of non-U.S. companies. LAIEX invests a minimum of 65% of its assets in small cap companies and allocates the rest of its assets in large and mid cap companies. LAIEX invests in both value and growth stocks. The Lord Abbett International Opportunities A fund returned 10.2% over the last one year period.

LAIEX has an expense ratio of 1.35% as compared to category average of 1.41%.

Fidelity International Capital Appreciation (FIVFX - MF report) seeks capital appreciation over the long term. FIVFX principally focuses on acquiring the common stock of foreign companies including those from emerging economies. FIVFX invests its assets across a wide range of countries and regions. Factors including financial strength and economic condition are considered before investing in a company. The Fidelity International Capital Appreciation (FIVFX - MF report) fund returned 12.2% over the last one year period.

As of March 2015, FMIJX held 258 issues with 1.68% of its assets invested in Novartis AG (NVS).