In the last 30 days the S&P/ASX 200 (Index: ^AXJO) (ASX: XJO) has posted a very impressive 5% gain. Almost all investors would be very happy with that level of return, so imagine how ecstatic the shareholders of the following three shares must be.

These three shares have gone absolutely gangbusters during this time. Here’s why:

Bellamy’s Australia Ltd (ASX: BAL)

In the last 30 days the share price of organic infant formula producer Bellamy’s has jumped by a huge 30%. Ever since Danone acquired US-based organic food producer WhiteWave Foods, investors have been fighting to get hold of its shares.

Based on the WhiteWave Foods deal analysts from CLSA suggested Bellamy’s shares could be worth up to $22 each according to reports in the Australian Financial Review. I’m bullish on the company and believe that its incredibly strong growth prospects in China make it a buy today even after the rise in its share price.

Data#3 Limited (ASX: DTL)

The share price of this business technology solutions company has risen 27% in the last 30 days thanks largely to a full year profit guidance update released to the market towards the end of July. Data#3 advised that FY 2016 net profit after tax is expected to be between $13 million and $13.5 million, which will be an impressive 22% to 27% increase on the previous year’s $10.6 million.

After a number of years of struggles, a change of focus onto the cloud and services sector appears to be paying off for the company. Even after this rapid rise in its share price its shares are trading at just under 16x full year earnings and providing a fully franked 4.8% dividend.

Touchcorp Ltd (ASX: TCH)

Touchcorp shares have rocketed higher by a stunning 40% in the last 30 days. During this time the provider of secure transaction processing technology announced a couple of key deals which it expects to provide it with significant revenue streams.

One announcement revealed Touchcorp has teamed up with Switzerland’s Cornèr Bank to successfully launch a secure online recharge platform to facilitate payments for the newly-issued Instant Visa prepaid card for Apple Pay. Another revealed a new software development and transaction services agreement with Change Up Holdings worth an initial $11.25 million.

Despite the strong gains in the last 30 days I would still consider Touchcorp to be a great long-term investment today.

Finally, before investing in any of these shares I would highly recommend you check to see if you own any of these awful shares. These three rotten ASX shares could be damaging your portfolio as we speak and might be best swapped out in my opinion.

3 Rotten Shares to Sell, and 1 to Buy Today

After a double-digit rally for the ASX since 2016 lows, investors should be on high alert. You'll find a full rundown below of 3 shares we think you should avoid today plus one top pick worth buying, even if the market turns south and the RBA keeps rates at an "emergency low." Simply click here to uncover these stocks.

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Motley Fool contributor James Mickleboro has no position in any stocks mentioned. The Motley Fool Australia owns shares of Bellamy's Australia and TOUCHCORP FPO. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy. This article contains general investment advice only (under AFSL 400691). Authorised by Bruce Jackson.