https://thepapertrade.com/blog Writing about intraday trading in Indian markets: what a round trip actually costs, why an option loses money in a flat index, and how to read your own record. en-in https://thepapertrade.com/blog/why-selling-an-option-needs-so-much-margin https://thepapertrade.com/blog/why-selling-an-option-needs-so-much-margin Buying an option costs the premium. Selling the same contract can block a hundred times that, because short-option margin is sized off the underlying's notional value, not off the premium. Here is why, and what it means for position sizing. Wed, 12 Aug 2026 00:00:00 +0530 https://thepapertrade.com/blog/the-index-went-nowhere-and-your-option-lost-money https://thepapertrade.com/blog/the-index-went-nowhere-and-your-option-lost-money Direction is one of three things moving your premium. The other two — time left in the session, and how much movement the market expects — leave no mark on the index chart at all. That is why practising on a chart teaches the wrong number. Fri, 07 Aug 2026 00:00:00 +0530 https://thepapertrade.com/blog/what-a-round-trip-actually-costs https://thepapertrade.com/blog/what-a-round-trip-actually-costs Brokerage is flat per order, STT is sell-side only, stamp duty is buy-side only, and GST compounds on top of three of them. Here is the whole arithmetic on one BANKNIFTY trade — including the freeze-quantity rule that quietly doubles your brokerage. Sat, 01 Aug 2026 00:00:00 +0530