UNUSUAL MARKET ACTIVITY ANNOUNCEMENTS A Study of Price Manipulation on the Indonesian Stock Exchange
We investigate stocks involved in the Unusual Market Activity (UMA) Announcements. The Indonesian Stock Exchange occasionally issues UMA announcements when it suspects that there are unusual price increases (positive UMAs) or price decreases (negative UMAs), as well as unusual increases in trading v...
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| Format: | Article |
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[Yogyakarta] : Universitas Gadjah Mada
2010
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| _version_ | 1797019892956790784 |
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| author | Perpustakaan UGM, i-lib |
| author_facet | Perpustakaan UGM, i-lib |
| author_sort | Perpustakaan UGM, i-lib |
| collection | UGM |
| description | We investigate stocks involved in the Unusual Market
Activity (UMA) Announcements. The Indonesian Stock Exchange
occasionally issues UMA announcements when it suspects that
there are unusual price increases (positive UMAs) or price
decreases (negative UMAs), as well as unusual increases in
trading volumes. We believe that UMA announcements signal a
high probability that stocks are being manipulated. We find no
differences in fundamentals and trading variables between
stocks in the UMA announcements and those not in the UMA
announcements. Any stock is vulnerable to market manipulation.
Stocks in the UMA announcements do not exhibit reversal
patterns, suggesting that price effect is permanent. UMAs seem
to convey relevant information, which is most likely in the form
of insider type of information |
| first_indexed | 2024-03-05T23:12:27Z |
| format | Article |
| id | oai:generic.eprints.org:28389 |
| institution | Universiti Gadjah Mada |
| last_indexed | 2024-03-13T19:06:41Z |
| publishDate | 2010 |
| publisher | [Yogyakarta] : Universitas Gadjah Mada |
| record_format | dspace |
| spelling | oai:generic.eprints.org:283892014-06-18T00:24:16Z https://repository.ugm.ac.id/28389/ UNUSUAL MARKET ACTIVITY ANNOUNCEMENTS A Study of Price Manipulation on the Indonesian Stock Exchange Perpustakaan UGM, i-lib Jurnal i-lib UGM We investigate stocks involved in the Unusual Market Activity (UMA) Announcements. The Indonesian Stock Exchange occasionally issues UMA announcements when it suspects that there are unusual price increases (positive UMAs) or price decreases (negative UMAs), as well as unusual increases in trading volumes. We believe that UMA announcements signal a high probability that stocks are being manipulated. We find no differences in fundamentals and trading variables between stocks in the UMA announcements and those not in the UMA announcements. Any stock is vulnerable to market manipulation. Stocks in the UMA announcements do not exhibit reversal patterns, suggesting that price effect is permanent. UMAs seem to convey relevant information, which is most likely in the form of insider type of information [Yogyakarta] : Universitas Gadjah Mada 2010 Article NonPeerReviewed Perpustakaan UGM, i-lib (2010) UNUSUAL MARKET ACTIVITY ANNOUNCEMENTS A Study of Price Manipulation on the Indonesian Stock Exchange. Jurnal i-lib UGM. http://i-lib.ugm.ac.id/jurnal/download.php?dataId=11452 |
| spellingShingle | Jurnal i-lib UGM Perpustakaan UGM, i-lib UNUSUAL MARKET ACTIVITY ANNOUNCEMENTS A Study of Price Manipulation on the Indonesian Stock Exchange |
| title | UNUSUAL MARKET ACTIVITY ANNOUNCEMENTS A Study of Price Manipulation on the Indonesian Stock Exchange |
| title_full | UNUSUAL MARKET ACTIVITY ANNOUNCEMENTS A Study of Price Manipulation on the Indonesian Stock Exchange |
| title_fullStr | UNUSUAL MARKET ACTIVITY ANNOUNCEMENTS A Study of Price Manipulation on the Indonesian Stock Exchange |
| title_full_unstemmed | UNUSUAL MARKET ACTIVITY ANNOUNCEMENTS A Study of Price Manipulation on the Indonesian Stock Exchange |
| title_short | UNUSUAL MARKET ACTIVITY ANNOUNCEMENTS A Study of Price Manipulation on the Indonesian Stock Exchange |
| title_sort | unusual market activity announcements a study of price manipulation on the indonesian stock exchange |
| topic | Jurnal i-lib UGM |
| work_keys_str_mv | AT perpustakaanugmilib unusualmarketactivityannouncementsastudyofpricemanipulationontheindonesianstockexchange |