# Stops in feel not math . 07 May 2026 morning . RupeeCase

_Systematic Investing . 2026-05-07 . By Tanmay Kurtkoti. Educational, illustrative, not advice._

Friend texted me last week. He had been holding a name for two years. Got stopped out on a Tuesday at the recent low. The stock closed Friday back above his original entry. He asked the obvious question. How do I avoid this.

We pulled the volatility numbers together. He had set a 10 pct trailing stop just below the recent high. He thought he was being prudent. The math said his stop was sitting inside the third standard deviation of normal weather on that stock. Translated . normal weather was going to look like a crash to that stop, and it was going to keep happening to him until the stop changed.

Here is the part most people do not see. A typical NIFTY 50 mid-cap name has an average daily range close to 1 pct. Across a full calendar year that volatility produces 4 to 6 episodes where the stock falls 10 pct or more from a recent peak and then quietly recovers inside about a month. Nothing actually went wrong with the underlying business in those episodes. Sector rotation. A Brent spike. A quarterly miss vs the estimate. A month-end FII de-risk. An index rebalance noise day. Five different stories. Same shape on the chart. Same outcome on the stop.

Now price the round trips. Each forced exit and rebuy costs roughly 0.30 pct after STT, brokerage, and the bid-ask slippage you pay on the way back in. Five round trips a year is 1.50 pct of pure friction. Before any timing miss on the rebuy. Across 10 years on a multi-lakh corpus, that is more than two full years of returns gone to whichever stop felt safe at the time of setting it.

The behaviour underneath this is universal. We anchor stops to round numbers near recent peaks because the round number feels like the floor and the recent peak feels like the cliff. Neither feeling has anything to do with the volatility of the stock. The volatility math does not care that 10 is a tidy number. The plain-English drawdown and stop-discipline modules with worked numbers are at https://rupeecase.com/learn/

A stop is a math problem. Most retail treats it as a feeling problem. The three honest questions are simpler than they look. Is the stop anchored in the stock's volatility, not in a round percent. Does the stop match your holding period, not last week of P and L. Have you priced the cost of being wrong four times a year before you set it once.

Match all three and the stop earns its place. Skip any one and the stop is a budget for friction the brokerage will be happy to collect. The risk profile that tells you whether you should be running stops at all on this position lives at https://rupeecase.com/risk-profile.html

A stop is not insurance. A stop is a budget for being wrong. Pick a budget you can actually afford to spend five times a year.