I screened for stocks that have given 20% or more returns since 13/08/2009. Since the database queried is the NSE, the results don't account for bonus or splits or other corporate actions

and so some stocks that should have been detected weren't (and
vice versa)!
Anyway, the screen threw up 811 stocks. (Reminder: BSE stocks are not included and nor are IPOs listed after 13/08/2009.)
Since Alchemist may not be too amused if I post the entire list, here's just the top fifty in .csv format:
"SYMBOL","CLOSE (13/08/2010)","CLOSE (13/08/2009)","CHG (%)"
"SEINVEST",59.3,8.5,597.65
"VIPIND",482.7,81,495.93
"TTKPRESTIG",931.25,157.4,491.65
"VENKEYS",741.15,130.8,466.63
"SPICEMOBIL",73.65,14.5,407.93
"WINDSOR",71.3,14.15,403.89
"TIMESGTY",81.65,17.4,369.25
"GENESYS",212.6,45.5,367.25
"SURYALAXMI",99,21.95,351.03
"LUMAXTECH",158.9,35.35,349.5
"HITACHIHOM",351.55,78.75,346.41
"PRECOT",244.6,55.4,341.52
"FAME",82.1,19,332.11
"AEGISCHEM",504.8,117.35,330.17
"GISOLUTION",26.35,6.55,302.29
"IFBIND",160.1,40.15,298.75
"PTL",53.45,13.5,295.93
"SHASUNCHEM",84.8,21.5,294.42
"PETRONENGG",430.05,109.95,291.13
"OISL",75.7,20.15,275.68
"SUPREMEINF",291.5,79.05,268.75
"SURANACORP",103.3,28.1,267.62
"DCM",101.8,28.15,261.63
"VINYLINDIA",18.2,5.05,260.4
"INDOASIFU",146.1,40.7,258.97
"GABRIEL",58.45,16.6,252.11
"KABRAEXTRU",184.5,53.05,247.79
"HANUNG",253.25,73.1,246.44
"KPIT",180,52.45,243.18
"INSECTICID",211.9,62.35,239.86
"IGARASHI",70.5,20.75,239.76
"SSWL",210,62.55,235.73
"NILKAMAL",321.05,95.9,234.78
"BHAGWATIHO",114.8,34.5,232.75
"WEIZMANIND",65.85,20,229.25
"PARAL",333.55,101.35,229.11
"SHOPERSTOP",646.35,197.25,227.68
"VAKRANSOFT",192.95,59.25,225.65
"COMSYS",44.4,13.75,222.91
"RAJVIR",189.2,58.85,221.5
"CREWBOS",112.65,35.45,217.77
"ARIES",169.95,53.8,215.89
"UBENGG",227.7,72.1,215.81
"CERA",332.75,105.95,214.06
"MAHSCOOTER",450.95,144,213.16
"KALECONSUL",132.6,42.35,213.11
"TTL",34.7,11.1,212.61
"OMNITECH",249.55,80,211.94
"WABCO-TVS",994.75,319,211.83
"STERTOOLS",128,41.2,210.68
Happy Independence Day!
