Contributing Judiciously Is an Important Part of Financial Security. an Individual Is Always Looking For Such an Investment Alternatives Which Give Maximum and Faster Returns. As It Is Verifiable Truth That More Returns Is Being Accompanied By More Hazard. the One Such Alternative of These Sort For Example Faster Comes Back With More Hazard Is the Investment In Stock Market. It Is Being Seen Over some Undefined Time Frame That the Individuals Are Attracting Towards Stock Market Because of the Liquidity and Multifold Returns, Although the Proportion of Loss of Assets Contributed By the Investors Is Also High at Certain Instances. Therefore the Present Study Is a Small Attempt to Understand the Basic Brain Research of an Investor Towards Stock Market and Different Parameters and Factors Related to It. the Study Is Based on a Rational to Understand the Basic Facts and Belief Systems an Investor Is Carrying About the Stock Market In General and In Explicit Investment Preference Mainly Centers Upon How Investor Examines and Acts on Information to Take Investment Decisions. the Study Attempts to Elucidate the Very Factor That Is Subjective Brain Research the Study of How Individuals (Counting Investors) Think, Reason, and Make Decisions. It Reveals That Individuals Don't Always Act Insightfully With Regards to Making Financial Decisions and That Their Behaviors Impacts Them In Making Investment Decisions. the Sample Size of the Study Is 61 Representatives of Construction Companies ...